10/05/2026
Study: People with flu end isolation while still contagious
The CDC recommends that individuals with the flu end isolation only after their symptoms have improved for at least 24 hours, including being fever-free without medication. However, the new study found that most people stop isolating around four days after symptoms begin, which coincides with peak viral shedding. This timing means many are still likely contagious when they resume contact with others, potentially contributing to further spread.
Most people with flu isolate for about four days, but that’s often when viral shedding is highest. Here’s what CDC guidance says to do instead.