“Controversial opinion with no evidence presented in just enough of a noncommittal way to deflect responsibility for its presentation. Watch me get downvoted, that’ll prove me right!”

“Widely accepted take”

“Your inability to provide evidence proves the original take!”

This way of “arguing” has been carefully crafted to prevent any intellectual debate.

Not that I think it will help you, here is an article in Nature on long Covid published in December of 2020 before vaccines were widely distributed: https://www.nature.com/articles/s41591-020-01177-6