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You may be at risk of catching the new subvariants BA.4 or BA.5 even if you had the original omicron, virologist Alex Sigal told DW's Science Unscripted.
South Africa Covid-19 Cases: Confirmed cases of Omicron BA.4 and BA.5 have risen from triple digits to over 6,000 cases in the past two weeks in South Africa. Here's what we know so far.
You may be at risk of catching new COVID subvariants BA.4 or BA.5 even if you had the original omicron, as virologist Alex Sigal told DW's Science Unscripted.
You may be at risk of catching new COVID subvariants BA.4 or BA.5 even if you had the original omicron, as virologist Alex Sigal told DW's Science Unscripted.
The most troubling aspect of the current surge is that we are unsure of the speed of infection and its lethality. Could the strains mutate into a variant that renders current vaccines obsolete?