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The pattern has become all too familiar: a new version of the SARS-CoV-2 virus is emerging and starting to dominate new Covid-19 cases until it is replaced by an even more contagious version of the virus. This year, sub-variants of the omicron variant of the virus have reigned. Currently this is variant BA.5. The omicron subvariant is tuned to evade immunity even from previous omicron infections. For those wondering why he got infected again so quickly
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