The flu is highly contagious partly because it�s possible to pass the virus on before becoming sick.

Elemental Health And Nutrition28 Jul, 2021Health

According to the Centers for Disease Control and Prevention (CDC), you can infect someone with the virus one day before your symptoms start. According to the Centers for Disease Control and Prevention (CDC), you can infect someone with the virus one day before your symptoms start. According to the Centers for Disease Control and Prevention (CDC), you can infect someone with the virus one day before your symptoms start.