I've heard of this before, at some point you would need to take it intravenously. But I survived. I really believe it was also being in quarantine for almost a year and everything around me being closed, weakening my immune system and everyone else's. While, yes I did go out as often as I could, interaction with people was far less than normal. This was the real pandemic and I cannot imagine how I would have ended up if I were overweight or unhealthy and didn't do this!