Scientists finally know why people get more colds and flu in winter

This from that auto-transcribed story below the video is just .. beautiful:

  “Not only do masks prrhinologist Dr. Benjamin Bleierotect you from the direct inhalation of viruses, but it’s also like wearing a sweater on your nose,” he said."

Poetry, of machine-translation kind.

The article says that the immune system in the nose does not work as good in colder temperatures. It is suggested to wear face masks to breathe warmer air.

My question is do we need to discard/wash masks more often in the winter? I’m not a biologist but in my understanding the colder outside temperature means more water vapor condensates on the mask which then should in my theory lead to a higher spread of bacteria and fungi.