So that's why the lock downs and stay indoors order... because it's the sunlight that creates the vitamin d in body.. Vitamin D builds the body immunity. When you stay indoors, your immune system weakens.... Now, you know why stay at home orders...

https://www.firstpost.com/health/link-between-low-vitamin-d-levels-high-covid-19-infection-risk-established-by-israeli-researchers-8643851.html

https://twitter.com/ZaidZamanHamid/status/1288212556935503880