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Aug 5, 2021 · How is it able to do that? 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.
- kathy.katella-cofrancesco@yale.edu
- Where did JN.1 come from, and how is it different? The JN.1 strain surfaced in the U.S. in September. It is a close relative of BA.2.86 (informally referred to as “Pirola”), a lineage of the Omicron variant that the CDC has been tracking since August.
- What do we know—and not know—about JN.1? Although there is not yet enough evidence to say anything definitively, JN.1 does not seem to cause more cases of severe disease or symptoms that differ from those associated with previous strains.
- How can people protect themselves against these new coronavirus subvariants? Anticipation of three viruses—SARS-CoV-2, influenza, and RSV—hitting around the same time in the fall and winter has contributed to fears of a “tripledemic” in recent years.
Aug 6, 2021 · SCIENCE. CORONAVIRUS COVERAGE. Why is Delta more infectious and deadly? New research holds answers. Studies show that Delta replicates more quickly and generates more virus...
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...
Aug 19, 2021 · The Delta strain circulating now—one of four “variants of concern” identified by the World Health Organization, along with four “variants of interest”—is so radically different from the virus that appeared in Wuhan, China, in late 2019 that many countries have been forced to change their pandemic planning.
Sep 1, 2023 · How contagious is it? 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.
Mar 1, 2022 · March 1, 2022 at 9:00 am. In November, a new coronavirus variant took the world by storm. Omicron has since caused an unprecedented wave of infections, striking about 90 million people in...
