Updated: Sept. 11, 2023
Throughout the past several years of COVID-19, the virus has mutated into different strains, including delta and omicron. Our infectious disease experts provide up-to-date information on the COVID variants, including symptoms and how effective the vaccines are at protecting you and your family.
Late summer 2023 saw a rise in COVID-19 hospitalizations caused by variants BA.2.86 (Pirola) and EG.5 (Eris). Our chief of infectious diseases answers questions about the new variants and the new COVID-19 boosters.
The omicron subvariant of COVID-19, called BA.5, became one of the dominant strains of the virus in the U.S. in the fall of 2022. During that time, it was the most easily spread strain to date and was able to evade immunity from past COVID infection and vaccination.
UC Davis Health’s Health Highlights e-newsletter provides the latest COVID-19 information and news you can use from our experts.
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