Each year, seasonal flu sickens about 1 billion people worldwide and causes approximately 290,000 to 650,000 respiratory ...

Mar. 25, 2025 — Early animal studies show that a single vaccine could protect the recipient from different variants of the coronaviruses that cause COVID-19, the flu and the common cold.

When you have a cold ... might be the flu, call your doctor right away so you can start treatment to help prevent serious complications. For adults, call your doctor if your symptoms are really ...