Two strains of the coronavirus first detected in California have become a variety of concerns in the threat ranking system used by the U.S. Centers for Disease Control and Prevention. The two variants – identified by scientists as B.1.427 and B.1.429 – both appear to be 20 percent more transmissible than the original virus, and some COVID-19 treatments may be less effective against it. The good news, however, is that the CDC does not believe that the approved vaccines are significantly less effective against the two variants, and that no coronavirus variant is the CDC’s highest threat level of ‘high consequence variant’. Three other variants – one first detected in the UK, another in South Africa and another in Japan and Brazil – are also on the CDC’s list of worrying variants. There are also three other ‘interesting variants’.
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