KNTV NBC Nightly News With Lester Holt December 12, 2021 01:48:00
Including the highly transmissible delta mutation. >> there is a much reduced effectiveness against symptomatic mild infection >> but in a sign of hope the uk study analyzing 600 positive cases, underscored the power of boosters providing 70 to 75% protection against symptomatic protection. >> there have been over 50 million booster doses administered in the united states. >> here in the u.s., omicron arrived earlier than initially thought now touching the majority of states so far no deaths and...
Source: archive.org