Good vid via Dr. Campbell on recent review paper on vite D. If I could only use three things, D, NAC, and lactoferrin would be it. Luckily, we are not limited to three. If D alone was of value to covid, every single person who entered the hospital with covid should have been given an IV of D, C, zinc, and NAC at a minimum, and they, along with lactoferrin and others, recommend to people ongoing during covid: