when is flu most contagious
Flu season typically starts in the fall and runs through the winter. A study published in the medical journal PLOS Pathogens suggested that flu viruses are most easily transmitted in winter, when the air is cold and dry. The flu is contagious a day before and five days to a week after its onset. Young children, people over 65, those with compromised immune systems, and people with a terminal illness are at risk of death from the flu. Pregnant women are also at greater risk. The flu can also cause premature birth.
How long is the flu most contagious? A: According to the Centers for Disease Control, the flu is most contagious five to seven days after flu symptoms develop. The flu can even be contagious one ... Full Answer >