Activities? You surely mean activationJust in case you missed it! The temperature’s inverse effect on the activities and transmission of viruses is a very basic knowledge that is covered in microbiology 101. The winter cold climate helps viruses flourish, live longer and spread. What’s more, in the short winter days, the majority of people immune system runs low on Vitamin D which makes them more vulnerable to infection. And the opposite happens in the summer time. A good example of that is the flu virus. It spreads like wild fire in the winter time and becomes almost totally inactive in the summer time.
and no, it's not covered in "microbiology 101". There is no such thing as winter "climate", but rather winter weather. Finally, vitamin D is primarily responsible for calcium metabolism (*)and it is certainly not the primary reason for seasonal colds (hint - what vitamin did they suggest to take during the winter?).PS. Seems like everyone wants to play doctor on the internet, especially today.
PPS. Calcitriol, which is metabolite of vitamine D is involved in immunomodulation but it's not it's primary purpose
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