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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.
Sep 1, 2023 · The variant of the SARS-CoV-2 virus that causes COVID-19 first surfaced in the United States toward the end of 2021 and spread like wildfire, spawning new sub-strains—some more transmissible than others. Now, multiple Omicron subvariants are driving most of the COVID-19 cases in the United States.
Sep 1, 2023 · It’s estimated that Delta caused more than twice as many infections as previous variants—in Connecticut, it was estimated to have been 80 to 90% more transmissible than the Alpha variant. In the U.S., in June 2021, after a steady decline in COVID-19 cases and hospitalizations, the arrival of Delta coincided with a rapid reversal of that trend.
Dec 27, 2023 · Neither EG.5 nor HV.1 appear to be more contagious or more likely to cause severe illness than earlier variants. Diagnostic tests and treatments such as Paxlovid also continue to be effective...
Aug 6, 2021 · CORONAVIRUS COVERAGE. Why is Delta more infectious and deadly? New research holds answers. Studies show that Delta replicates more quickly and generates more virus particles than other...
Jan 8, 2024 · January 8, 2024. 6 min read. What to Know about the New COVID Variant JN.1. A new variant of the COVID-causing virus SARS-CoV-2 is behind the latest surge in infections this winter, but it...
