A new COVID-19 variant called B.1621, or mu, by the World Health Organization is being monitored by scientists. While this variant is making news, it is not the dominant strain in the U.S. or elsewhere, says Dr. John O'Horo, a Mayo Clinic infectious diseases physician.
Vaccination remains the best protection from COVID-19 infection. Like most vaccines, getting vaccinated for COVID-19 is not 100% perfect. But if vaccinated people do get sick or have a breakthrough infection, they are much less likely to be hospitalized or die than people who are not vaccinated.