The omicron BA.4 and BA.5 subvariants are responsible for 80 per cent of covid-19 cases in the US. But meeting up outside, wearing masks and staying up to date on vaccines are still effective ways to reduce your risk of infection
The BA.4 and BA.5 covid-19 strains now driving waves of infections in many countries are the most contagious yet – mostly due to mutations that allow them to dodge our immune defences.
The good news, though, is that there is still plenty you can do to reduce your risk of infection., largely due to omicron subvariants BA.4 and BA.5, according to the World Health Organization .
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