According to the Organization, he began following them because of their “Additional mutations, which need to be studied further to understand their impact on immune escape potential”. Viruses mutate all the time, but only a few mutations affect their ability to spread or evade previous immunity of vaccination or infection, or the severity of the disease they cause.
For example, BA.2 now represents almost the 94% of all cases sequenced and it’s more transmissible than her sisters, but the evidence so far suggests that is not more likely to cause serious illness. According to the WHO, only a few few dozen cases of BA.4 and BA.5 to the global GISAID database.
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The UK Health Security Agency said last week that the BA.4 in South Africa, Denmark, Botswana, Scotland and England between January 10 and March 30.
All cases of BA.5 were produced in South Africa until last week. But Botswana Ministry of Health announced this Monday that it identified four cases of BA.4 and BA.5all of them in people between the ages of 30 and 50 who were fully vaccinated and experiencing mild symptoms.
CORONAVIRUS COVID-19
Wikimedia Commons
By Jennifer Rigby
Source: Ambito
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