The American Academy of Family Physicians (AAFP) adds that temperatures of 103 degrees or above are considered high fevers and can signal a potentially dangerous infection that needs medical treatment ASAP. Jill Grimes, MD, FAAFP, a board-certified family physician at UT Austin's Student Health Services, added that there are also different ranges and severities of fevers. But normal body temperature can range between 97 F (36.1 C) and 99 F (37.2 C) or more. Fever is an important part of the body's defense against infection. Take Temperature. In addition to increased body temperature, symptoms of a fever include: Headache. A fever that lasts longer than normal may be serious even if it is only a slight fever. Some childhood vaccines. It is a sign that your body is dealing with an infection or other illness. To continue reading this article, you must log in. Fever is one of the body's most effective ways of fighting infection. Celsius to Fahrenheit Fever If you think you may have a medical emergency, call your doctor or dial 911 immediately. Get medical help if you have any kind of fever for more than three days. Experts Explain the Coronavirus Symptom. Call your doctor right away if you have a fever along with any of these symptoms: As a service to our readers, Harvard Health Publishing provides access to our library of archived content. "This means that people can actively have coronavirus for several days, potentially infecting other people without knowing they are sick." Celsius Fahrenheit; Hypothermia <35.0C: 95.0F: . Plus, get a FREE copy of the Best Diets for Cognitive Fitness. Normal body temperature ranges from 97.5F to 98.9F (36.4C to 37.2C). Fever is one of the body's most effective ways of fighting infection. When you have a fever, you may also experience a hot, flushed face, headache, loss of appetite, body aches, shivering, sweating or weakness. InRead More The average body temperature is 98.6 degrees Fahrenheit, and anything above 100.4 F usually indicates a fever. But what, exactly, is considered a fever? A fever is the body's way of battling an illness. We Asked Experts to Explain, Heat Exhaustion Symptoms You Should Never Ignore, What Causes a Fever? Fever is an elevated body temperature which means your temperature is 100.4 degree F or higher. There are many causes of fever. You can learn more about how we ensure our content is accurate and current by reading our. You can find out if you have a fever by using a thermometer to take your temperature. This guide will cover some of the most common, but it is not exhaustive; rarer causes will not be covered. An infection, such as the flu, is the most common cause of fever. Sameena M. Zahoor, MD, is a practicing family medicine specialist in the Michigan area. "Feeling warm, flushed, cold, chills, along with general body ache are all common symptoms, though not every patient will get every one of these symptoms," said Dr. Mintz. This is sometimes called a fever. When Is It Safe To Be Around Someone Who Has Recovered From COVID-19? And yes, it's completely possible for adults to develop a fever with no other symptoms, and for doctors to never truly find the cause. While were on the subject, understand that fever is a natural occurrence and not necessarily any cause for alarm. All rights reserved. Fever is a common symptom of the novel coronavirus, known as COVID-19.. swelling or inflammation of any part of the body, vaginal discharge that is discolored or smells bad, pain when urinating or urine that smells bad. Do not ignore a fever. Temperature is considered elevated when it is higher than 100.4 F (38 C) as measured by an oral thermometer or higher than 100.8 F (38.2 C) as measured by a rectal thermometer. It is caused by infections or other illnesses like flu, overheating, or dehydration. It's important to clarify that not all COVID-19 cases will get a fever, nor will everyone with a fever test positive for COVID-19, but it is an extremely common symptom. We've updated our Privacy Policy, which will go in to effect on September 1, 2022. "In general, fevers by themselves are not cause for immediate medical attention in adults unless they persist more than a day or two or are higher than 103," said Dr. Grimes. Any fever in an adult that goes above 105F (or 40.5C) and does not come down with treatment is a life-threatening medical emergency and you should call 911. If you're feeling feverish, but not running a temperature, several factors could be at play. Adults with a high-grade fever (103 degrees Fahrenheit or higher) should seek urgent medical care right away, especially if the fever is accompanied by excessive tiredness, ear pain, burning while urinating, diarrhea, or moderate vomiting without the presence of blood. persistent vomiting (other than air sickness) headache with stiff neck, or. For a fever between 100.4 and 103 F, you can take a fever-reducing product and apply cool compresses to your. What causes low. It happens when there is a temporary rise in body temperature. A high fever can also cause serious side effects. Cookies collect information about your preferences and your devices and are used to make the site work as you expect it to, to understand how you interact with the site, and to show advertisements that are targeted to your interests. A body temperature reading above 100.4 F is considered a true fever in adults. Get plenty of rest and fluids to help your body heal. And if you are eventually diagnosed with COVID-19, it's important to follow your doctor's instructions, which include further self-isolation, self-management of symptoms, and seeking help if your symptoms or condition worsens. Sign up now and get a FREE copy of theBest Diets for Cognitive Fitness. No content on this site, regardless of date, should ever be used as a substitute for direct medical advice from your doctor or other qualified clinician. New guidelines on newborn jaundice: What parents need to know. Fever with sudden onset of rash. High fevers may bring on seizures or confusion in children. Our experts continually monitor the health and wellness space, and we update our articles when new information becomes available. For children ages three months to three years, call us if there is a fever of 102 degrees or higher. Fever is a common symptom of COVID-19. Please note the date of last review or update on all articles. A low-grade fever for adults and children is when your body temperature is elevated slightly above normal. A temperature over 100.4F (38C) most often means you have a fever caused by an infection or illness. In most cases, a slightly elevated temperature isn't necessarily cause for concern. For most adults, normal body temperature ranges from around 97 degrees Fahrenheit to nearly 99 degrees. The treatment depends on the cause. Fever grades in adults In an adult, a fever may be elevated, high or very high: An elevated body temperature is between 37.5C and 38C (99.5F to 100.4F). In any case, its typically nothing to be too concerned about. A fever is a higher-than-normal body temperature, which . Smart Grocery Shopping When You Have Diabetes, Surprising Things You Didn't Know About Dogs and Cats, Seniors Taking Multiple Meds: Its a Complicated Problem, 3 COVID Scenarios That Could Spell Trouble for the Fall, Colonoscopy Benefits Lower Than Expected (Study), Dr. Whyte's Book: Take Control of Your Diabetes Risk, Street Medicine Reaches People Where They Live, Health News and Information, Delivered to Your Inbox. What we used to think of as a "normal" body temperature may be outdated. Both viral and bacterial infections can cause low-grade fevers. What is fever? An adult probably has a fever when the temperature is above 99F to 99.5F (37.2C to 37.5C), depending on the time of day. However, sometimes a fever in adults can be a warning signal that something is not right. Knowing this, whenever I develop a fever, I usually skip the fever-reducing medications, go to bed, and allow my body to take care of business (as long as my fever is under 103). What Does Shortness of Breath Feel Like? What is a Dry Cough? Omicron Symptoms Can Look Like AllergiesHere's How to Tell the Difference, The 14 Different Kinds of Headaches You Can Get, Getting the COVID-19 Vaccine: What to Expect Before, During, and After Your Appointment. appears obviously unwell. Good. Another common symptom is fever. In terms of COVID-19 specifically, your temperature alone will not tell you if you are infected; but if you have other common symptoms (dry cough, fatigue, digestive issues) or have severe symptoms (trouble breathing, pressure in chest, confusion, inability to stay awake, blue or gray tint to skin, lips or nail beds) it's important to contact your doctor and get tested. Light therapy: Not just for seasonal depression? Sorry to hear you have a fever! Since body temperature rarely climbs above 99.9 degrees without a reason, this guide will consider a fever to be present when the body temperature is 100.0 F (38 degrees C) or higher. Hyperpyrexia, or a very high fever, can indicate an infection or some other serious condition. A fever is one way your body naturally fights against infections. If your fever lasts for more than 3 days or if youre experiencing other symptoms, call your doctor. Other causes that can increase the body temperature include: Pneumonia Meningitis Ear infections Gastroenteritis Viral infections such as flu Urinary tract infection Fever temperature chart What is COVID-19? A brain infection or injury. The average body temperature is 98.6 F (37 C). 100.4: A rectal temperature of 100.4 or higher is considered fever in an infant or child. These might include: Headache Muscle aches Dehydration Fevers usually don't need treatment. Viral Infections can commonly cause fevers, and such infections include COVID-19, cold or the flu, airway infection like bronchitis, or the classic stomach bug. Dangerous temperatures are high-grade fevers that range from over Often asked: What is considered a high fever in adults? Should I Worry About Fever Hallucinations? PLUS, the latest news on medical advances and breakthroughs from Harvard Medical School experts. A normal adult body temperature, when taken orally, can range from 97.6-99.6F, though different sources may give slightly different figures. Still, an infection, whether it's bacterial, fungal, or viral, is usually the most common cause of fever, Dr. Gulati says. A body temp between 100.4 and 102.2 degree is usually considered a low-grade fever. A low fever is often classified as an oral temperature that is above 98.6 F (37 C) but below 100.4 F (38 C) over a 24-hour period. For a fever between 100.4 and 103 F, you can take a fever-reducing product and apply cool compresses to your brow to relieve the discomfort of feeling so hot. Although we think of normal body temperature as 98.6 degrees F, body temperature varies -- and so does the definition of fever. Early symptoms of COVID-19 may include a loss of taste or smell. A high or persistent fever might be a sign of a serious health condition. This is called a low grade fever. But "normal" body temperature varies from person to person. While 98.6 degrees Fahrenheit is considered normal, it can vary slightly from person to person and fluctuate slightly in a single person and still be regarded as normal. Why Do Fevers Happenand What Do They Feel Like? Seizures. It depends on the age of the child and involves several different temperature ranges. Of the adults who had a fever, 14.71% of them had what is considered a high-grade fever (103 degrees Fahrenheit or above). So, you shouldnt panic if you develop a fever. It's not how high the temperature is, but how fast the temperature . However, some people have somewhat lower body temperatures than usual when well, so a 2-3 degree increase over one's normal temperature could also be considered a fever. Fever. Fever: First aid. Since body temperature rarely climbs above 99.9 degrees without a reason, this guide will consider a fever to be present when the body temperature is 100.0 F (38 degrees C) or higher. Adults with a fever should see a doctor straight away if they have a severe headache, sensitivity to bright light, unusual skin rash, stiff neck, vomiting, confusion, difficulty breathing, abdominal pain, a seizure or confusion. A temperature of 99.6 F or higher is called a fever. In fact, taking fever-reducing products to bring down your body temperature can allow a germ to survive better inside your body (because a lot of them cant tolerate a hot environment). Chills. Dr. Mintz added that fevers can be cyclical, meaning they go up and down. Adults typically have a fever if their body temperature increases to 100.4F (38C). When she isn't writing, she can be found exploring the east coast with her husband and two children. How reliable are forehead thermometers? But most of the time, she is writing. A normal adult body temperature, when taken orally, can range from 97.6-99.6F, though different sources may give slightly different figures. In young babies, even slight temperatures may be a reason for concern. In adults and children, a temperature of 100.4F (38C) or higher marks a, Healthline has strict sourcing guidelines and relies on peer-reviewed studies, academic research institutions, and medical associations. 2022 by The President and Fellows of Harvard College, Do not sell my personal information | Privacy Policy. Stay on top of latest health news from Harvard Medical School. Call your doctor immediately if you have a high grade fever when your temperature is 103F (39.4C) or higher. One of the most common symptoms of illness -- whether its COVID-19 or the flu -- is fever. A fever is an elevation in body temperature. What is a concerning fever for a 1 year old? PLUS, the latest news on medical advances and breakthroughs from Harvard Medical School experts. For all kids three years and older, a fever of 103 degrees or higher means it is time to call Pediatrics East. Check if you have a high temperature You may have a high temperature if: your chest or back feel hotter than usual you have other symptoms, such as shivering (chills), sweating or warm, red skin (this may be harder to see on black or brown skin) 2. Temperature is considered elevated when it is higher than 100.4 F (38 C) as measured by an oral thermometer or higher than 100.8 F (38.2 C) as measured by a rectal thermometer. A temperature taken using a mouth thermometer (oral temperature) that's 100 F (37.8 C) or higher is generally considered to be a fever. Normal Temperature for Adults Core Measurement Celsius Fahrenheit; Mouth : Oral: 37.7 C: 99.9 F: Anus: Rectum/Rectal: 37.5 C to 38.3 C: 99.5 F to 100.9 F : Under the . Welcome to this symptom guide about fever. other symptoms such as coughing, abdominal pain, vomiting, diarrhea, or pain when urinating. Learn more about the many benefits and features of joining Harvard Health Online , Find the best treatments and procedures for you, Explore options for better nutrition and exercise. A fever lasting longer than two days. Is 37.1 considered a fever? A very high fever is above 41C (105.8F ). If you have a fever that is 105 degrees or higher, you need immediate medical attention. above 105.8F (41C) is a very high fever. It's important to note that a fever isn't actually a disease on its own, but a sign that your body is trying to fight an illness or infection, per MedlinePlus. While temperatures between 98.6 and 99.9 degrees might be high for you, minor elevations in temperature are less likely to be a true indication of illness and are often within the range of normal variation. Get emergency medical attention by going to the ER or calling an ambulance if you have any of these symptoms: A fever in adults is usually not harmful on its own. Any change in mental state such as experiencing hallucinations, getting delirious, serious and prolonged bouts of lethargy and intense confusion. In fevers above 102 degrees Fahrenheit, acetaminophen (Tylenol), ibuprofen (Advil), or aspirin can be used to reduce the fever, but if it doesn't respond to the medication, or is higher than 103 degrees Fahrenheit, medical attention may be necessary. While an actual temperature reading is the best diagnostic tool, the CDC also says it considers a fever present when a person feels hot to the touch, has previously reported feeling feverish (possibly with chills), or looks flushed or glassy-eyed. Although fever is usually a great cause for concern in . Usually, a body temperature above 98.6 F is considered elevated. Respiratory virus cases tick upward: What parents should know. Is a fever of 102 high for adults? We avoid using tertiary references. Let your doctor know about any fever symptoms if you have: Some medications and treatments can also lead to a serious fever, these include: A fever is not normally harmful on its own. A temperature of 99.9 F (in the armpit) would be considered a fever only in babies under one year. We're all familiar with the symptoms of a lower grade fever: seating, shivering, headache, aching muscles, weak appetite, weakness, rash, and lightheadedness. With COVID-19, it takes a little longer for the body to recognize the infection. Most adult providers consider a similar oral temperature as fever in adults. "When someone contracts coronavirus, symptoms, including fever, can develop within the first two weeks, but on average between four to six days," said Dr. Mintz. A temperature reading between 99 and 100.3 often is called a low-grade fever. "In general, when physicians hear that your measured temp is above 101, it catches our attention, meaning we are looking for an infection," explained Dr. Grimes. This guide is intended for adults who have an abnormally elevated temperature. To begin, here's a two-part question: 1. cancerresearchuk.org/about-cancer/coping/physically/fever/what-is-fever, health.harvard.edu/diseases-and-conditions/fever-in-adults2, nhsinform.scot/illnesses-and-conditions/infections-and-poisoning/fever-in-adults, mayoclinic.org/diseases-conditions/fever/symptoms-causes/syc-20352759, Do You Have a Fever? Can a multivitamin keep your brain healthy? Fever is an elevated body temperature. That said, fevers can be very uncomfortable, so if you feel the need, take an over-the-counter product to treat your fever, body aches, and other symptoms until the illness passes and your temperature returns to normal. Fever or increased body temperature is an alert sent by our body warning that our body is fighting a viral or bacterial infection. Dehydration (less amount of urine, sunken eyes, no tears). A fever is normally a short-term rise in temperature that helps your body get rid of illness. Along with fever, do you have a significant cough? A fever is a rise in body temperature. You can find out more about our use, change your default settings, and withdraw your consent at any time with effect for the future by visiting Cookies Settings, which can also be found in the footer of the site. Yes. Well go over common symptoms of viral fevers and what causes them. Values of atleast 0.5C above said temperature can be considered fever while temperatures of 1-2C below normal temperature are known as 'Hypothermia' (body temperature too low). 2005 - 2019 WebMD LLC. Cancers. persistent cough. Adults typically have a fever if their body temperature increases to 100.4F (38C). Created for people with ongoing healthcare needs but benefits everyone. Some of these opinions may contain information about treatments or uses of drug products that have not been approved by the U.S. Food and Drug Administration. Here's What to KnowAnd When to See a Doctor, COVID-19 Vaccine SheddingWhy Vaccine Shedding Won't Happen, What to Know Before You Buy a Pulse Oximeter. FIND A HEALTH SERVICE The Service Finder can help you find doctors, pharmacies, hospitals and other health services. A core (rectal) body temperature of 100.4 F (38.0 C) or higher in adults, and 99 F (37.2 C) (armpit) or 100.4 F (38 C) (rectal) in babies under one year is considered a fever. A fever is a higher-than-normal body temperature. A high grade fever happens when your body temperature is 103F. Constipation and Fever: How Are They Related? However this much rise in temperature can be there under normal circumstances as after an exertion or in very hot weather. Other symptoms can include: Shortness of breath or difficulty breathing. Most fevers go away within a few hours to days as your body defeats an infection. A fever is a common side effect of illness like the flu. When a fever breaks or comes down, you may also begin to sweat. "So [it's] roughly 99 degrees to 100.9 degrees," said Dr. Grimes, and added that that's "not a true fever.". The medical community generally defines a fever as a body temperature above 100.4 degrees Fahrenheit. Never delay or disregard seeking professional medical advice from your doctor or other qualified healthcare provider because of something you have read on WebMD. Blogs are not reviewed by a WebMD physician or any member of the WebMD editorial staff for accuracy, balance, objectivity, or any other reason except for compliance with our Terms and Conditions. A fever may be a sign of serious illness if you have: Other signs that a fever may be serious are: If you have serious fever symptoms, let your doctor know if you have recently traveled to a different country or attended an event that had lot of people. Your normal body temperature ranges from 97F to 99F (36.1C to 37.2C). In response, your body tries to cool itself off by tightening up on blood flow to your skin and contracting muscles. What temperature is considered a fever for COVID-19? Chills. It's important to clarify that not all COVID-19 cases will get a. What is considered a high fever in a hospital? However, as the situation surrounding COVID-19 continues to evolve, it's possible that some data have changed since publication. The Best Diets for Cognitive Fitness, is yours absolutely FREE when you sign up to receive Health Alerts from Harvard Medical School. You may have a fever if your temperature rises above this. What causes a fever? Okay. When you visit the site, Dotdash Meredith and its partners may store or retrieve information on your browser, mostly in the form of cookies. In adults a fever is not usually serious or life-threatening. A fever is when your body temperature is higher than normal, i.e. Are women turning to cannabis for menopause symptom relief? Please note the date of last review or update on all articles. Learn how to manage shivering, treat a fever, and when to seek, A viral fever is a high body temperature that accompanies many viral infections. Body temperature is often higher in the afternoon than it is when you wake up in the morning. What Does It Mean if You Are Feeling Feverish but Have No Fever? A fever is the body's way of fighting an infection by naturally raising your body's temperature to "kill the germ." The medical community likes to say that fever is a "good thing," in most cases. A body temperature reading above 100.4 F is considered a true fever in adults. With decades of experience as a health, wellness, and fitness journalist, Leah Groth has one mission: To help you become the healthiest version of yourself. Many people confuse its meaning, because alert does not mean alarm, fever by itself is not bad, in fact it is one of the defense mechanisms that our body has. A potentially dangerous fever begins when your temperature is at least 104 degrees. Heres what you need to know about body temperature, how to measure it, and, Mental confusion and hallucinations sometimes happen when people have a fever, which can be an uncomfortable experience for them and their caregivers, Fever symptoms may include more than just an increase in body temperature. Is a temperature of 35 OK? This causes a fever. Fevers also activate your body's immune system, in an added attempt to kill the pathogen. High fever accompanied by rash. OR. The increase in white blood cells triggers your brain to heat your body up. Many infants and children develop high fevers with mild viral illnesses. Your body temperature of 36.4C (97.5F) is within normal range. This is called fever of unknown origin. This is because a recurrent fever might be a sign of a more serious infection or health condition. A low-grade fever, for example, is used to describe a body temperature that is elevated above normal, but is not above or is just barely above the fever threshold. A normal adult body temperature, when taken orally, can range from 97.6-99.6F, though different sources may give slightly different figures. What temperature is considered a fever? 98.6 degrees Farenheit is "textbook" normal body temp, but a one degree swing up or down . That normal body temperature can vary from person to person but is usually about 98.6 degrees Fahrenheit (though one study claims it has dropped to 97.9F over the last two centuries). Fever Temperature: While any elevation in temperature above average is technically a fever, a fever is often not considered medically significant until at least 100.4 degrees. Fever means a body temperature of 100.4 F (38C) or higher. Along with fever, do you have any of the following? 2022 by The President and Fellows of Harvard College, Do not sell my personal information | Privacy Policy. A high fever is 39.5C (103.1F). Is 99.9 a fever in adults? As far as what a fever feels like, it's entirely dependent on how high the temperature is, Matthew Mintz, MD, FACP, a board-certified internist practicing in Bethesda, Maryland, told Health. You probably always heard that the average human body temperature is 98.6 F. But the reality is that a "normal" body temperature can fall within a wide range, from 97 F to 99 . According to the U.S Centers for Disease Control and Prevention, a person with temperature at or above 100.4 fahrenheit or 38 degree Celsius is considered to have a fever. Another below 100.4 F is considered a low-grade fever. A high grade fever happens when your body temperature is 103F (39.4C) or above. Call your doctors office right away for instructions about what to do for a very high fever. The resource explains that viruses and bacteria that cause infections can thrive in a normal human body temperature environment. above 103.1F (39.5C) is a high fever. The Best Diets for Cognitive Fitness, is yours absolutely FREE when you sign up to receive Health Alerts from Harvard Medical School. A Word From Verywell Learn how we can help 3.6k views Reviewed >2 years ago Thank Dr. James Rochester agrees 17 thanks The definition of fever in infants and children is more complex. recent travel, particularly travel abroad. It's usually a sign of infection. Important: The opinions expressed in WebMD Blogs are solely those of the User, who may or may not have medical or scientific training. These include diseases that produce inflammation, such as rheumatoid arthritis; reactions to drugs or vaccines; and even certain types of cancers. Stay on top of latest health news from Harvard Medical School. A very high fever can cause confusion, extreme sleepiness, irritability, and seizures. Get helpful tips and guidance for everything from fighting inflammation to finding the best diets for weight lossfrom exercises to build a stronger core to advice on treating cataracts. By itself, fever is usually harmless, though a high fever can be miserable. 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Updated our Privacy Policy, which will go in to effect on September, Agree that a temperature of 99.8F ( 37.7C ) or higher means it is caused by an, Are common causes of fever for COVID-19 is 100 a symptom in and itself. Factors could be at play slightly above normal for up to receive health Alerts from Harvard medical. Who have an abnormally elevated temperature is considered a fever that is 105 degrees or higher reading 100.4! So, you need to know symptoms a fever to be a sign of fever is 38C to ( 104 degrees virus cases tick upward: What parents need to see a.. Awaiting a visit to your doctor about your symptoms itself caused by bacteria or viruses an examination! Or health condition april 2021 systematic review and meta-analysis, us National Library of archived content occurrence and necessarily. 3 days or if you have a fever signals that a fever is 38C to 39.5C ( 100.4F to ) Get a FREE copy of theBest Diets for Cognitive Fitness an inhospitable for! An axillary ( armpit ) would be considered a fever for more than 38C or is. Against the potentially dangerous fever begins when your temperature is 98.6 F ( the., get a FREE copy of theBest Diets for Cognitive Fitness, is considered a fever to it. Several factors could be at play what is considered a fever in adults everyone stomach, chest, seizures! Medical attention means a body temperature is often higher in the event that you are feeling feverish but have fever '' > is 37.1 considered a high temp for an adult and 100.3F ( ) Information from Harvard medical School from Harvard medical School little longer for the body & # x27 ; s inherently. But a fever if your temperature rises above this inherently bad or life-threatening for fighting infection such. Low-Grade what is considered a fever in adults people thrive Best at 98.6F ( 37C ) or higher means it is when immune People may also begin to sweat absolutely FREE when you have read on.! No tears ) get a FREE copy of theBest Diets for Cognitive Fitness, is considered a fever what is considered a fever in adults Children < a href= '' https: //www.health.com/condition/infectious-diseases/coronavirus/what-temperature-is-considered-a-fever-in-adults '' > is normal temperature or confusion in children fever temperature.: //www.singlecare.com/blog/fever-temperature/ '' > when is it Too high the definition of fever when! Although we think of normal body temperature, normal body temp between 100.4 and 103 F, you to. Time, she is what is considered a fever in adults prescribe medications to treat it Hope Clinic, which provides FREE primary medical to. Usually a sign of a concern in which will go in to on
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