Flu season nowhere near done; getting more dangerous
Another study broke down common cold-causing viruses (rhinoviruses) and the impact on them due to cold, dry weather. The study found that the risk of a human rhinovirus infection is associated with colder temperatures and lower humidity during the three days prior to the infection beginning. An important bit to keep in mind is that the study also found that the overall risk of rhinovirus infection was lower at subfreezing temperatures.
Cold, dry weather doesn't only support viral transmission, though. When the weather is cold, the temperature inside of your nasal cavity can be lowered. Per a study published in 2015, there's a "reduced innate immune response by infected airway cells" when the temperature is colder. In other words, your body isn't able to defend itself via its immune system as effectively when it's cold. Basically, cold weather acts as a double-edged sword in the virus world.With flu season nowhere near done, it's important to enact in preventative actions. Simply washing your hands frequently, sneezing into a clean tissue and getting adequate sleep can go a long way in keeping you healthy. Staying hydrated and taking vitamin D will also help keep your immune system in working order!