What happened to the old COVID variants, like Delta? Could they come back? Submitted by number1dork t3_120rixo on March 24, 2023 at 5:29 PM in askscience 209 comments 3,359
StickySnacks t1_jdjb3s6 wrote on March 24, 2023 at 8:13 PM Reply to comment by [deleted] in What happened to the old COVID variants, like Delta? Could they come back? by number1dork What are the chances the vaccine is actually ineffective? Permalink Parent −3−
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