Contagiousness of The H1N1 flu virus. More research is being done on how long a person can be infectious (be able to spread the virus to others), but it is believed that this period is for one day before the onset of symptoms and continues for approximately seven days after symptoms have started.The time it takes between being infected and experiencing symptoms is between two and seven days.
Tags: Contagiousness, Flu, h1n1, virus