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COVID-19 often shares a lot of the same symptoms as influenza, including stuffy or runny nose, sore throat, cough, muscle aches, fatigue and fever or chills. But unlike the flu, COVID symptoms can ...
COVID-19 is also often accompanied by a persistent fever, whereas allergy symptoms never include a fever. A fever from a cold tends to be short-lived, if it manifests at all.
COVID-19 is still raging, and we're seeing an especially high surge of it in winter 2025—plus high rates of flu, RSV and even HMPV, not to mention that it's common cold season, too. That perfect ...
Fever is one of the most common symptoms in COVID-19 patients. However, the absence of the symptom itself at an initial screening does not rule out COVID-19. Fever in the first week of a COVID-19 infection is part of the body's natural immune response; however in severe cases, if the infections develop into a cytokine storm the fever is ...
Transmission and life-cycle of SARS-CoV-2 causing COVID-19. Coronaviruses vary significantly in risk factor. Some can kill more than 30% of those infected, such as MERS-CoV, and some are relatively harmless, such as the common cold. [49] Coronaviruses can cause colds with major symptoms, such as fever, and a sore throat from swollen adenoids. [91]
Influenza-like illness is a nonspecific respiratory illness characterized by fever, fatigue, cough, and other symptoms that stop within a few days. Most cases of ILI are caused not by influenza but by other viruses (e.g., rhinoviruses, coronaviruses, human respiratory syncytial virus, adenoviruses, and human parainfluenza viruses).
Cough, fever, and a stuffy or runny nose could accompany all four conditions. Experts weigh in on how to tell them apart. That nagging cough you have might not be COVID.
Do you have allergies, a cold, the flu or COVID-19? Here's a quiz based on what experts say about common symptoms, treatments, when to get tested the illnesses.