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The analysis was conducted by Discovery Health, South Africa’s largest private health insurer, and the South African Medical Research Council. In the new South Africa findings, people who received two doses of the Pfizer-BioNTech vaccine appeared to have just 33% protection against infection, compared to those who were unvaccinated, during the country’s current omicron-fueled surge, but 70% protection against hospitalization. Health officials say the variant will replace delta as the dominant coronavirus strain within days. In Britain, omicron cases are doubling every two to three days. The CDC is tracking how fast the percentage doubles, and as more cases come in, it may be better able to predict whether - or when - the omicron variant becomes the dominant version of the coronavirus in the U.S, health officials say. That rose to about 3% last week, the Centers for Disease Control and Prevention reported Tuesday.īut it varies from place to place, and is as high as 13% in the New York/New Jersey area, according to the agency. Two weeks ago, omicron accounted for less than 0.5% of the coronaviruses that were genetically sequenced in the U.S. health officials estimate that a small, but growing proportion of new COVID-19 infections are due to omicron, and that the rise is particularly dramatic in some places.
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“Our society needs to learn how to wait, rather than either panicking or dismissing early findings,” Dowdy said. Young adults may be more likely to be sick without knowing it, have more intense exposures and experience milder disease, he said. “To date, omicron has disproportionately infected young adults - people who probably have more social contacts and are more likely to attend large gatherings,” Dowdy said. David Dowdy, an infectious disease epidemiologist at Johns Hopkins Bloomberg School of Public Health. When omicron reaches broader populations more useful information will emerge, said Dr. Still, some experts cautioned that it’s too soon to draw conclusions since the variant is quite new and hospitalizations can lag weeks behind infections. In South Africa, although case numbers are rising, hospital admissions for adults diagnosed with COVID-19 are 29% lower compared to the wave the country experienced in mid-2020, after adjusting for vaccination status, according to the new analysis. It’s unclear whether omicron’s rapid spread will overwhelm hospitals. “With omicron, it seems to be happening everywhere all at once with extremely rapid kinetics.” could look to Europe and Britain for an early signal of what was coming, Lemieux said. “Omicron is moving extraordinarily fast, faster even than the most pessimistic among us thought it was going to move,” Lemieux said.ĭuring past waves of the pandemic, the U.S. Jacob Lemieux, who monitors variants for a research collaboration led by Harvard Medical School.
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The spread can be seen in Britain, the United States and Denmark, where confirmed omicron cases are increasing at a worrisome pace, said Dr. The findings are preliminary and have not been peer-reviewed - the gold standard in scientific research - but they line up with other early data about omicron’s behavior, including that it seems to be more easily spread from person to person.