Big answer for everybody on these flu threads ~ it takes a week and a day to determine what kind of flu virus, if any, just attacked you.
...Mexico sent 14 mucous samples to the CDC on 18 April and dispatched teams to hospitals looking for patients with severe flu or pneumonia-like symptoms. These teams noticed something strange: the flu was killing people aged 20 to 40. Flu victims are usually either infants or the elderly.