First it's that rough feeling, like you swallowed a bit of sandpaper. You know what's next: a sore throat. Is it the start of a cold, strep -- or something else?
"For most sore throats, you probably don't need to see a doctor. You can treat it with over-the-counter remedies, take time off from work, and rest," says Jeffrey A. Linder, MD, MPH. He's an associate professor of medicine at Harvard Medical School.
It's a problem: Kids and adults going to work when they should stay home. Around any school or office, you hear them coughing and sneezing. Yet experts' flu prevention advice is clear: Stay home when you are sick.
The problem is, "With a lot of flu viruses, people can be infectious before they have symptoms," says Erica Brownfield, MD, a professor of internal medicine at Emory University School of Medicine in Atlanta.
In fact, you're spewing flu germs even before you realize you're sick, she tells...