You'd think staying indoors would help to prevent the virus, however germs pass between people and, when we’re trying to stay warm indoors together, germs spread more readily. This also means there’s a higher chance of the cold or flu being shared around. You don’t have to be close to people to catch the virus either, the window and doors being shut will only shut the virus in along with the warmth. After all, it’s in the air.
To reduce the risk of catching the common flu, minimise your exposure to the bacteria that causes it. Regularly cleaning your working and living environments, using anti-bacterial agents and regularly washing your hands can potentially make a big impact on seasonal health.