There's also one big difference between the flu and COVID or a cold that can indicate which illness you have. Don't ignore it ...

For a second time this season, at least 41 states are reporting high or very high levels of the flu. Here's how to stay safe.

Here's what to know about flu symptoms in 2025, how to tell if it's something else, and how to protect yourself: But there are some differences. COVID-19 can show up later than the cold or flu ...