New coronavirus variants aren't cause for alarm yet, but mutations could make COVID-19 harder to fight, experts say

The two authorized COVID-19 vaccines and others under development are expected to continue to be effective against the new strains of the coronavirus.      

New coronavirus variants aren't cause for alarm yet, but mutations could make COVID-19 harder to fight, experts say

The two authorized COVID-19 vaccines and others under development are expected to continue to be effective against the new strains of the coronavirus.