Variants emerge as a result of naturally occurring mutations in viruses. For example, the flu virus changes often, which is why doctors recommend a new flu vaccine each year.
Scientists monitor all COVID-19 variants but may classify certain ones, like Omicron and Delta, as “variants of concern.” Scientists monitor these variants carefully to learn if they spread more easily, cause more severe cases than other variants, or evade vaccine protection.
As long as COVID-19 spreads, mutations and new variants are expected to occur, the best way to prevent the spread of COVID-19, including its variants, is to get vaccinated and boosted. Being vaccinated decreases the likelihood you will get sick, and makes it less likely you will need hospitalization or die if you get infected. Increased vaccination rates around the world will decrease the likelihood that the coronavirus will mutate into other dangerous variants.
Added December 9, 2021