Submitted by number1dork t3_120rixo in askscience
Tephnos t1_jdk75gb wrote
Reply to comment by joshuas193 in What happened to the old COVID variants, like Delta? Could they come back? by number1dork
Yes, and no.
It is less severe because everyone has some kind of immunity to it. The virus inherently is probably still as virulent as the original type to someone with zero immunity.
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