Oct 22, 2025 · Learn more about the symptoms, causes and prevention of this potentially deadly viral infection that attacks the respiratory system.

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 …

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.

Oct 22, 2025 · Learn more about the symptoms, causes and prevention of this potentially deadly viral infection that attacks the respiratory system.

Oct 22, 2025 · It's not easy to tell these health conditions apart based on their symptoms alone. Find out about the differences between these illnesses.

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.

Apr 30, 2025 · The most common way to develop viral gastroenteritis — often called stomach flu — is through contact with an infected person or by consuming contaminated food or water.

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 …

Jan 9, 2024 · Among otherwise healthy people, flu symptoms vary. Symptoms include a sore throat, runny nose, fever, chills and muscle aches. Flu symptoms can make you feel awful. But …

Mar 23, 2023 · Find out more about flu caused by the H1N1 virus. Learn how to prevent and treat the flu.