https://www.rt.com/news/549937-bill-gates-omicron-vaccines/
“Sadly, the virus itself – particularly the variant called Omicron – is a type of vaccine. That is, it creates both B-cell and T-cell immunity, and it’s done a better job of getting out to the world population than we have with vaccines,” he said.
Due to a large amount of “infection exposure” in certain regions, the risk of serious illness from Covid-19 has been “dramatically reduced,” Gates continued, also noting that severe symptoms are “mainly associated with being elderly and having obesity or diabetes.”