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Aug 5, 2021 · According to an internal CDC document, the Delta variant – one of four “variants of concern” that have evolved from SARS-CoV-2, the virus that causes COVID-19 – is more than twice as infectious as the original virus and as infectious as chickenpox. Denise Barchas, RN, works in the ICU respiratory isolation room at UCSF Mount Zion Medical Center.
Apr 8, 2022 · A variant of concern has been observed to be more infectious, and is more likely to cause breakthrough infections or reinfections in those who are vaccinated or previously infected. These variants are more likely to cause severe disease, evade diagnostic tests, or resist antiviral treatment.
Nov 4, 2023 · Together the omicron variants make up nearly all COVID-19 infections in the United States. People who are up to date on their vaccines can get breakthrough infections. They can then spread the virus to others. But the COVID-19 vaccines can work to prevent severe illness.
Jun 14, 2022 · While Omicron can cause deadly infections in some people, it is less severe overall than the Delta variant. Scientists measure the severity of a coronavirus variant by examining how many people...
Jun 22, 2021 · Delta may cause more frequent breakthrough infections, or infections in people who have been fully vaccinated, than other variants. However, these infections tend to be mild or asymptomatic.
May 22, 2021 · How Dangerous Are The New COVID-19 Variants? May 22, 20217:53 AM ET. Heard on Weekend Edition Saturday. Michaeleen Doucleff. 3-Minute Listen. Playlist. With the coronavirus vaccinations slowing...
Jul 2, 2021 · The latest coronavirus variant has spread to about a dozen countries—including India, the U.S., and the U.K.—while scientists scramble to figure out if the strain is more deadly or...
