The latest omicron sub-variants are more portable and better able to evade immunity from vaccines and past infections, but there are still steps you can take to reduce your risk of infection


July 15, 2022

Passengers wear masks on the New York subway

Robert Nickelsburg/Getty Images

The BA.4 and BA.5 covid-19 strains, which are now causing waves of infections in many countries, are the most contagious to date – largely because of mutations that allow them to evade our immune defenses. The good news, however, is that you can still do a lot to reduce your risk of infection.

Over the past two weeks, global covid-19 cases have increased by 30 percentlargely due to the omicron BA.4 and BA.5 subvariants, according to the World Health Organization (WHO).


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