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 a single hospitalization according to the cdc more than three-quarters of those infected were fully vaccinated, including peter mcginn who was minnesota's first case >> i felt like it was a cold just because at the time, you know, i'm vaccinated i'm boosted. the people i was with are vaccinated and boosted and the thought of covid never even crossed my mind >> states like new