Cold and flu drugs might be helping spread the flu.

Researchers say people who take medication to lower fevers and feel better might decide to get out of the house while they're still sick and can infect other people.

The study used mathematical calculations rather than measuring the actual spread of flu, so it's come with a little controversy in the medical community.

But the researchers say they're just trying to answer some questions about the benefits of treating flu symptoms, and according to their calculations, a thousand more people may die every year because of flu sufferers getting out while they're still infectious.

--Rob Archer