In warmer weather, viruses die more quickly in the air and thus do not spread as easily. This is a main reason why the flu is seasonal. Another reason is that during warmer weather people are not in close quarters indoors as much, where germs spread easily. | In warmer weather, viruses die more quickly in the air and thus do not spread as easily. This is a main reason why the flu is seasonal. Another reason is that during warmer weather people are not in close quarters indoors as much, where germs spread easily. |