Influenza (flu) - Symptoms and causes - Mayo Clinic
Dec 19, 2025 · Learn more about the symptoms, causes and prevention of this potentially deadly viral infection that attacks the respiratory system.
Flu symptoms: Should I see my doctor? - Mayo Clinic
Oct 8, 2025 · Unlike a cold, the flu tends to come on suddenly and makes you feel much worse than a cold. Common symptoms of the flu often include a fever but not always, as well as …
Influenza (flu) - Diagnosis and treatment - Mayo Clinic
Dec 19, 2025 · Learn more about the symptoms, causes and prevention of this potentially deadly viral infection that attacks the respiratory system.
COVID-19 vs. flu: Similarities and differences - Mayo Clinic
Oct 22, 2025 · Seasonal flu symptoms usually show up quickly, about 1 to 4 days after you're around someone who is sick. COVID-19 symptoms generally appear 2 to 14 days later.
What to do if you get a respiratory infection: A Mayo Clinic …
Dec 30, 2024 · Flu symptoms include sore throat, runny or stuffy nose, fever, body aches and fatigue. These symptoms may overlap with other illnesses, like the common cold, but key …
Bird flu (avian influenza) - Symptoms and causes - Mayo Clinic
Jun 8, 2024 · Flu viruses in other animals, such as birds, may be a risk to people. Learn more about the symptoms, causes, prevention and treatment for bird flu in people.
Facts about the flu - Mayo Clinic News Network
Nov 17, 2020 · Flu is a general term for seasonal influenza, which is a viral infection that attacks your respiratory system. Symptoms often come on suddenly and may seem like a cold at first, …
COVID-19, cold, allergies and the flu: What are the differences?
Oct 22, 2025 · Flu symptoms usually appear about 1 to 4 days after exposure to an influenza virus. COVID-19 can cause more-serious illnesses in some people than can the flu. Also, …
Self-care for the flu - Mayo Clinic
Jan 9, 2024 · Symptoms include a sore throat, runny nose, fever, chills and muscle aches. Flu symptoms can make you feel awful. But if you're otherwise healthy, not pregnant and younger …
Viral gastroenteritis (stomach flu) - Symptoms & causes - Mayo …
Apr 30, 2025 · This condition, often called stomach flu, is usually harmless, except for infants and people with immunosuppression. Symptoms can usually be managed.