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I thought this is more or less a logistical nightmare. We cant create and distribute that many vaccines for the N number of strains. It would be possible but w

I thought this is more or less a logistical nightmare. We cant create and distribute that many vaccines for the N number of strains. It would be possible but we just never really tried.

majewsky 6y ago
No, a significant part of it is that immunity is temporary. The article describes a particular cold virus where immunity lasts about 40 weeks, hence it resurges every winter.