If they had consulted for VOCs there could be other meanings, but with that '2' I agree with JOHN, it is a part of the name of the sars-cov-2 virus misspelled. See coronavirus, covid-19 .
JOHN
COV2 comes from the virus that produces the coronavirus, SARS-CoV-2, short for severe acute respiratory syndrome coronavirus 2. Cov is the designation of a coronavirus and 2 is a particular type.
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