Would you hire the developer that copy and pastes from StackOverflow without understanding the code or the developer who reads StackOverflow to come up with their own solution/conclusion?
In stead of a blithe comment, you could directly link evidence and instead you chose the less productive of two routes. It makes you look like an ass and doesn't contribute to the conversation.
You are wrong because it's not a claim. The pathophysiology of Covid is hard science. Gravity existing is not a claim either. No need to support either of those with ref's is because they are easily googleable. It's a waste of people's time.
Again, no sources to back up any of your claims. As Hitchens once famously claimed, "What can be asserted without evidence can also be dismissed without evidence."
Neither one of you provided sources. I think that you're right, but how's a layperson to know?