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Researchers have studied brain activity during parasomnias to better understand the mechanisms behind sleepwalking and other sleep behaviors.

Four UNG students presented at Posters at the Capitol event held Feb. 27 in Atlanta. The Georgia Undergraduate Research Collective organized the event.

Something far more virulent. >> reporter: the year after the first visit to the biosafety lab, alexi and his team are still working to answer those critical questions. >> it just goes like wildfire. but it's not -- it doesn't cause as severe of a disease. >> reporter: the latest research shows that in a lab setting, omicron infections can protect against the more virulent delta variant. sigal says vaccines are still critical to avoid severe illness and death. in a year's time from now, what kind of discussion do you think we'll have about covid? >> there's a good chance we'll be standing here ...

Better now. probably covid is ending. >> reporter: are people being overly optimistic about where we are right now? >> certainly that's a scenario that we can potentially contemplate, but equally on the other side of the spectrum is a scenario that says this variant is replaced by something far more virulent. >> reporter: a year after our first visit to his bio safety level 3 lab, they are still working to answer those critical questions. >> it just goes like wildfire. but it's not -- it doesn't cause as severe of a disease. >> reporter: the latest research shows that in a lab setting, omicron...

Joining me now is nbc news correspondent sam brock and msnbc medical contributor dr. kavita patel. she served as white house health policy director during the obama administration. dr. patel, good news from the pfizer ceo. with how much caution do you take the touting of the booster with him? >> katy, i'll take good news, especially when it comes to a variant we're watching globally. but with cautious. they took blood from patients who were immunized with two or three doses and used that lab to neutralize reproduction of the omicron virus in a lab setting, basically in a petri dish, if you wil...