The number of hospitalized COVID-19 patients has fallen to about 110,000 from a high of 132,000 on Jan. 7. States that have been hot spots in recent weeks such as California and Arizona have shown similar improvements during the same period. She said she can’t predict how long it will take for the vaccines' effects to be reflected in the numbers. Rivers said she is concerned that the more contagious variants of the virus could lead to a deadly resurgence later this year. Fauci said scientists are already preparing to adjust COVID-19 vaccines to fight the mutated versions.

Source: ABC News January 25, 2021 17:19 UTC