Pretty San Francisco 49ers vs Kansas City Chiefs Super Bowl Shirt
Antibody Dependant Enhancement. That's where the presence of antibodies from an initial infection or vaccination makes the disease more severe the second time you're infected. It happened with SARS-1 vaccine attempts. There also was just the case in Nevada where an individual's second run with the disease was much more severe than his first, and they were two distinct strains. This is nowhere even close to confirmed, and this could be a myriad of other things. But it's important to be aware of.
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