What is the primary reason why the number of colds and flu cases rises during the winter?
The main cause of the increase in colds and flu in the winter time is the decrease in temperature and humidity, which leads to a decrease in air quality. This decrease in air quality allows the viruses that cause colds and flu to spread more easily. Additionally, people tend to stay indoors more during the winter months, which increases their chances of coming into contact with germs and viruses that can cause colds and flu. [ STRONGMEMORE ]
