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The Story With Martha MacCallum-20211216-20:18:00

a university of hong kong study awaiting peer review found the omicron variant infects and multiplies 70 times faster than delta and the original coronavirus strain in human air passages leading to the lungs but it's slowing in infecting the lungs. researchers say this could appear why it spreads so rapidly but why most cases are mild. another study shows the booster dose of pfizer's vaccine offers 70% protection about symptomatic covid infection with those that received two primary doses of the mrna vaccine. although u.s. health officials are urging everybody to get booster shots, the cdc still considers those that have received their primary doses to be fully vaccinated. >> we're continuing to follow

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Special Report With Bret Baier-20211216-23:28:00

worry in the variant. under control the same figure as a year ago ago. when it comes to mandates results are mixed. 68% favoring mask for travelers and only 15 approving for vaccine and testing requirements for larger businesses. cdc estimates the omicron variant account for 3% nationwide and expect that figure to increase rapidly. >> in some areas of the country, the estimates of omicron are even higher, including in new york and new jersey. where cdc projects that omicron could represent about 13% of all cases. >> a university of hong kong study awaiting peer review found omicron is 70 times faster than strains infecting and multiplying in human air passages leading to the lungs but much slower infecting the lungs themselves. researchers say this may explain why omicron appears to spread rapidly while causing less

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