I take 6,000 units of D3 daily. It also helps with arthritis.
I take 50mg a day of zinc.
I take 1,000 mg a day of vitamin C.
In Israel and England, they found out that people who had high doses of D3 daily either never got Covid or had mild symptoms. In Israel Arab women got Covid way more than anyone else because they are always covered up when outside and in public. They have 9 million citizens of which 1 million are Arabs citizens. Their study indicated that people who had 6,000 units or more of D3 daily never got covid or had mild symptoms.