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The US just saw its lowest Covid-19 daily case count since October. But here’s why experts are still worried

The US on Monday reported more than 53,800 new Covid-19 infections: its lowest daily case count since October and a vastly different number from those plaguing the country just last month, when infections were topping 200,000 a day. Statistics across the US are now reflecting more encouraging trends. California, one of the states hit hardest

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Common genetic test often wrong when identifying rare disease-causing variants such as BRCA1 and BRCA2, study says

A genetic test used to detect common traits many people share is not reliable in identifying rare disease-causing variations, such as those that can predict breast and ovarian cancer, a new study has found. The SNP test, which stands for “single nucleotide polymorphism,” is used by direct-to-consumer DNA and ancestry companies to identify common traits

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Cities and states begin delaying Covid-19 vaccine distribution because of winter storms

Vaccine distribution in states and cities across the US are slowing down because of winter storms that have left more than a third of the continental US with below-zero temperatures Monday. The severe winter weather sparked emergency declarations in at least seven states, including Alabama, Oregon, Oklahoma, Kansas, Kentucky, Mississippi and Texas. Here are the

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Pfizer-BioNTech vaccine sharply reduces symptomatic Covid-19 in the real world, Israeli researchers say

Pfizer-BioNTech’s Covid-19 vaccine appears to reduce symptomatic coronavirus infections by more than 90% in the real world, Israeli researchers said Sunday. The findings, while preliminary, suggest that the vaccine remains remarkably effective in a mass vaccination campaign — outside the carefully controlled conditions of a clinical trial. The Clalit Research Institute, part of a large

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Widespread vaccinations in the US won’t come until the summer. Here’s what’s been driving down Covid-19 cases so far

More than 38 million Americans have so far received at least their first dose of a Covid-19 vaccine — but it’s not the vaccinations that have driven Covid-19 numbers down across the US, one expert told CNN. “It’s what we’re doing right: staying apart, wearing masks, not traveling, not mixing with others indoors,” Dr. Tom

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