It's a combination of different factors. Cold weather makes it harder for your airways to defend themselves. There are I believe some cold viruses that are viable for longer or are stronger in cold weather, but since the cold is many different viruses I am not sure how much difference it makes.
True. Influenza viruses don't like heat. You can potentially reduce the amount of active cells substantially by going to the sauna. 60°C is already sufficient to reduce it by 4 orders of magnitude.
It's a combination of different factors. Cold weather makes it harder for your airways to defend themselves. There are I believe some cold viruses that are viable for longer or are stronger in cold weather, but since the cold is many different viruses I am not sure how much difference it makes.
True. Influenza viruses don't like heat. You can potentially reduce the amount of active cells substantially by going to the sauna. 60°C is already sufficient to reduce it by 4 orders of magnitude.
https://www.mdpi.com/2036-7481/13/4/60