Delta Mutation News Today : Breaking News, Live Updates & Top Stories | Vimarsana

A weeknight survey of major news stories, human-interest segments and interviews with newsmakers, anchored by Norah O'Donnell.

Omicron don't necessarily interfere with t—cell immunity and if that's the case a good reason for helping that to be rare to see ultimately the reductions in the severity per case. the other issue is that people who ate doesn't look like the booster is providing a substantial increase in antibody levels and the protection against acute disease there are people who have been vaccinated and had covid—19 are probably in some of the best positioned in terms of protection against omicron. to denmark — it'sjust announced stricter covid measures to battle soaring infection numbers there. the go...

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...

Plus, may be to blame. nbc news correspondent matt bradley has our report from london. >> tonight, the uk reported more than 50,000 new cases its, highest number in three months, as officials are investigating a new mutation of the virus being referred to as delta plus. overall cases are up 18% in just the past week, deaths have risen by 11%, despite -- fast and thorough vaccination programs. british doctors now demanding answers and actions. >> i think i've learned from, previous mistakes, that we keep making and unfortunately people lives are being lost daily as a result of this. >> but so f...

>> reporter: well, here in the u.k., that delta mutation formally called ay.4.2 makes up 6% of cases scientists don't know if it's deadlier or more contagious than the original delta. lester >> all right, matt te word frm buckingham palace that queen elizabeth spent the night in the hospital let's get the latest from molly hunter in london molly, what are palace officials saying >> reporter: lester, they say the queen went into the hospital yesterday afternoon for what they're calling preliminary investigation. she returned to windsor castle today they say she's in good spirits. this comes aft...