A big part of the effort to vaccinate enough people to slow down the pandemic and eventually create herd immunity is a global call-to-arms to prevent too many more contagious and even more deadly variants from coming forth. Antibody resistance in new variants is of major concern, also. The longer the pandemic occurs, the more dangerous our future becomes.
One example of many, many more: New Covid variant (BV-1) detected at Texas A&M lab shows signs of antibody resistance and more severe illness in young people.
https://abc13.com/covid19-variant-texas-am-bv-1-coronavirus-variants/10538150/
Search: Texas Covid variant
Search: Covid variants
About the variants:
https://www.cdc.gov/coronavirus/2019-ncov/transmission/variant.html