Twitter and Dr Feigl-Ding: Bolster up the immune system is the old expression but this is what the vaccine is about; watch immune system at work

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Eric Feigl-Ding @DrEricDing · A white blood cell chasing down a bacteria. Immune systems are amazing things — but we still need to vaccinate to help our defense, especially the #DeltaVariant, can replicate so fast that it has 1000x higher viral load than old 2020 strain. #MaskUp too.
https://twitter.com/i/status/1425040245880463376

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