The guy that figured out mmr back in the 50s theorised it would need to be yearly because it keeps changing.
Almost 70 years ago they knew it wouldn't be a one off and all the normies surprised in 2021 they need annual jabs
The guy that figured out mmr back in the 50s theorised it would need to be yearly because it keeps changing.
Almost 70 years ago they knew it wouldn't be a one off and all the normies surprised in 2021 they need annual jabs
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