last week. there are also new outbreaks in professional sports, from hockey to basketball and football. today the cleveland browns announced six players, including quarterback baker mayfield are now on the reserve covid-19 list. this is after the teams had a coach test positive, and news from earlier this week that more than 60 nfl players are infected, according to a league source, and that was just on monday and tuesday alone. let s get right to our senior medical correspondent elizabeth cohen. elizabeth, this is starting to feel a lot like the early days of the pandemic, sadly. what more can you tell us about colleges and universities and nfl and other outbreaks? it really does feel like deja vu. let s look at universities who have moved classes or exams on online. middlebury college, princeton, depaul, southern new hampshire, cornell university. new york university is strongly encouraging professors to move their exams to online. they say they re seeing an acceleration
also, that offers substantial improvement and at this point, he does not see the need to adjust the formula. our booster vaccine regiments work against omicron. at this point, there is no need for a variant specific booster. and so the message remains clear. if you are unvaccinated, get vaccinated and particularly in the arena of omicron, if you are fully vaccinated, get your booster shot. alexandria field has more. the u.s. crosses a terrible threshold. 800,000 covid related deaths. delta s toll continues across the country as omicron cases spread. the variant now in 36 states. we expect to see the proportion of omicron cases here in the united states continue to grow in the coming weeks. early data suggests that omicron is more transmissible than delta, with a doubling time of about two days. cornell university shutting down early for the holiday break with more than 900 cases detected on campus. a high percentage of them identified as omicron in fully vaccinated pe
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