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As governments and health officials navigate pandemic, researchers stress the danger that comes with bad information.

Since researchers were working with samples in a lab. cnns larry madowo is live in johannesburg. thats where they are getting a sense of how effective the vaccines are against it. >> reporter: thats correct, max. this is the first experiment that tries to track how this omicron variant might behave in somebody who is already vaccinated. so its a small sample size, just 12 samples here in a lab. so its not a real-life experiment. but the researchers say this is a little positive because they ex...

10 out of 10 times. now, obviously, thats a relatively small sample size but whenever you get 10 out of 10 in politics, thats a very clear sign the democrats at this point, if history holds, are in a lot, a lot of trouble. >> harry, one of the things congress watchers do, its like detecting trouble in a forest. you see rabbits and squirrels and animals running out of the woods into the field and democratic congressman peter defazio from oregon, he just announced hes retiring. this is the 11th ho...

Another, but potentially also invade the immune system >> and many mutations in omicron are similar to the highly contagious mutations in delta do we know if it is more transmissible than the delta variant? >> if you look at the data out of south africa, it does appear it is more transmissible than delta. i think again, it is sort of a small sample size. >> that sample size is only around 100 confirmed cases of omicron in south africa but officials describe an exponential rise in overall covid c...

Refer to united states residents. united, the only other major airline to operate from the region, the airport group says it has many unanswered questions about the new measures. and sweeping travel restrictions are going in effect in israel. an expert says that israel is now on the state of emergency as confirming its first omicron variant case. hamas gold reports. >> reporter: the government acting quickly. the person returned from malawi, the variant detected because earn person to tel aviv m...

Vaccine. they both did a pretty good evaluation based on the limited available available today based on the risks and benefits of the vaccine. they didnt really look at the medical need as much but when they look at the risk benefit, what they did find is that there was some potential benefit. there was no reduction in hospitalization, infection or deaths shown. i guess because it was a sample size of kids who got the vaccine. they didnt show any severe side effects, however we know that some of...

What we know now in this sample size? >> im going to be honest and i wrote this down because i didnt want to get his quote wrong but when they met on october 26 and they talked about whether or not they were going to approve this or not in five to 11-year-olds, he said we are never going to learn about how safe the vaccine is until we start giving it, that is the way it goes. these are our children. they are not guinea pigs. im sorry, this is science we are going by, lets just see what happens. ...

Good evaluation based on the limited data available of the risk and benefits of the vaccine, didnt really look at the medical need as much but when they looked at the risk-benefit what they did find was there was potential benefit, there was no reduction in hospitalization, severe infection or death shown, largely because 3000 kids who got the vaccine, similarly they didnt show any severe side effects. but we know some of the severe side effects are rare in the sample size of 3000, too smaller s...

There? >> hey, victor, things running fairly smoothly so far here, increasing to 509 in prince william county. no major issues to report. as you can see behind me, voters have been trickling in steadily all day. some folks casting their ballots as we speak. we should note this part of northern virginia, critical for terry mcauliffe to draw turnout if he expects to beat glenn youngkin, this precinct turned out for him to elect him governor in 2013, and helped elect his successor ralph northam in ...

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