I already said that in the other thread. You do know that after a week with flu you're no longer contagious, right? I played in a game last year where the GM had flu, none of us caught anything.
The CDC disagrees with you. CDC - Seasonal Influenza (Flu) - Q & A: Seasonal Influenza (Flu): The Disease
CDC said:How long is a person with flu virus contagious?
The period when an infected person is contagious depends on the age and health of the person. Studies show that most healthy adults may be able to infect others from 1 day prior to becoming sick and for 5-7 days after they first develop symptoms. Some young children and people with weakened immune systems may be contagious for longer than a week.
Most healthy adults are infectious for a week. That means some lie outside that range.