[Lex Computer & Tech Group/LCTG] Heard of Herd Immunity

[Jerome Slate]

Dear Group,
This is from member Al Levin.
It's about herd immunity.

https://www.washingtonpost.com/graphics/2020/health/coronavirus-herd-immunity-simulation-vaccine/?utm_campaign=wp_post_most&utm_medium=email&utm_source=newsletter&wpisrc=nl_most

Jerry

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