Only a few dozen cases of BA.4 and BA.5 have been reported to the global GISAID database, according to WHO
The UK’s Health Security Agency said last week BA.4 had been found in South Africa, Denmark, Botswana, Scotland and England from Jan. 10 to March 30.
All the BA.5 cases were in South Africa as of last week, but on Monday Botswana’s health ministry said it had identified four cases of BA.4 and BA.5, all among people aged 30 to 50 who were fully vaccinated and experiencing mild symptoms.
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