Video by successful treating physician Dr. Richard Urso that was banned by YouTube, but can be found on BitChute, regarding how COVID-19 presents as two diseases in one. An early virus infection that can effectively be treated with zinc and anti-virals, that morphs quite quickly into an intense battle against inflammation.
Please click this bitchute link for Dr. Urso's presentation "AFDSeminar - COVID19 - Two Diseases":
https://www.bitchute.com/video/J70IHMYz0Hk1/Here is a video that aptly describes the two stages as experienced personally.