re: The circle of COVID. Unvaccinated better equipped to defeat looming Lamda variant

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read two theories on that, bio-engineered to mutate, or the vaccine antibodies have forced the mutations.

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It's an RNA virus, they have a rudimentary replication system that results in a lot of errors (mutations). Most of the time the mutation has no effect or makes them less effective, but occasionally not. It's the reason it will likely never go away completely.

The idea that there are only a couple versions of this is ridiculous, there were dozens of versions just in the first few months.