Check out the blogs/podcasts from Chris Martenson MD Peak Prosperity
https://www.peakprosperity.com/about/
Martensen makes no secret that Covid -19 can be very nasty indeed. However, he was warned by the US medical authorities back in the early days that he should not give Hydroxyxhloroquine with zinc. He told them he had adequate evidence to prescribe and would be happy to present to a tribunal. They have not bothered him after that.
He said back in April that viral the genome had some strange characteristics especially in the areas related to human infection. The normal mutation rates were non existent in those areas almost as if they had been pasted in. Australian virology research has since said the chances of these changes happening naturally are almost zero. Other researchers found signatures of gene editing tools.
All of that has of course gone quiet. For some reason nobody wants to admit this is not an entirely natural virus.
Vitamin D is vital for immune health. We should get enough is summer from sunlight but during winter many people are low. Many are low all year because they avoid sunlight.
Back in 2014, Ivor Cummings delivered lectures about Vitamin D (actually the lack of). He is not a medic, but uses existing medical evidence to show that most people should be taking 5000 IU per day. Way beyond the 600 IU in the official figures. The information is never given by GPs because they would lose their licence. High dose vitamin D is supposed to cause artery calcification thought the mechanism is never explained. It seems to be ignored that Vitamin D is almost always prescribed with calcium supplements.
Anyone can check out this information for themselves. Ivor Cummings shows the data sources and explains the mechanisms.
I have a friend who used to visit her mother on Trinidad 2x per year. When he mum died, she became ill. She put it down to depression. Her GP refused to prescribe medication but hinted she should check vitamin levels. She discovered the vitamin D issue, put herself on 5000 IU and her health turned around. When she told her GP, he explained that he is not allowed to discuss the issue even with dark skinned people. I don't see why he could not order a blood test. Rules is rules I guess.