1. The delta variant is more contagious than earlier strains of COVID.
First detected in March, the delta variant is now the predominant COVID-19 strain in the U.S., according to the Centers for Disease Control and Prevention.in the U.S., scientists are still learning more about what makes this variant different from prior versions of the virus.
Delta is more contagious because it “sheds more virus into the air, making it easier to reach other people," said Dr. Loren Miller, associate chief of infectious disease at Harbor-UCLA Medical Center and Researcher at Lundquist Institute in Torrance, CA . Another recent study awaiting peer approval in Singapore, noted that the delta variant was significantly associated with increased need for oxygenation, admission to an intensive care unit, and death when compared to the alpha variant.
According to the CDC, more than 90% of COVID cases in the U.S. are currently caused by the delta variant. We know that “there is a lot of Delta out there … from the public health authorities who regularly survey for delta [and other strains] using special tests called molecular typing” said Miller.
Although there are rare cases of severe breakthrough infections that require hospitalization that can occur in persons with a “weakened immune system," Miller said. This comes in time for the new guidelines for booster COVID shots in immunocompromised patients.More COVID cases are being reported in teens, young and middle-age adults. That's not because delta is inherently more dangerous for younger people -- but rather, because younger people are less likely to be fully vaccinated.
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