The "Vaccine" is Killing People! Will It Kill More Later Due to Enhanced Immune Response?

My sister is in a nursing home in Maryland. At one point she tested positive for the Wuhan virus and was moved to the COVID unit for about two weeks. She never had any symptoms, and I have my doubts she really had the virus. She has COPD, diabetes, is very overweight and is on oxygen. But I also convinced her to take Vitamin D and Vitamin C since most deaths occur in patients with very low levels of Vitamin D. So if she did have it, she was protected.