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The term variant of concern (VOC) for SARS-CoV-2, which causes COVID-19, is a category used for variants of the virus where mutations in their spike protein receptor binding domain (RBD) substantially increase binding affinity (e.g., N501Y) in RBD-hACE2 complex (genetic data), while also being linked to rapid spread in human populations ...
Although the basic symptoms of COVID-19, such as fever, chills, and fatigue, remain the same, coughing and loss of smell became less common with the delta variant. Dan74 // Shutterstock Omicron ...
“Variants that can infect people better or evade immunity to the last variant are more likely to cause a new COVID wave,” Peter Kasson, M.D., Ph.D., B.S., of the University of Virginia’s ...
At the end of June, the CDC recommended that everyone ages 6 months and older receive the updated 2024-25 COVID-19 vaccine, which was tweaked based on the most dominant variants circulating this year.
Symptoms of COVID-19. Some less common symptoms of COVID-19 can be relatively non-specific; however the most common symptoms are fever, dry cough, and loss of taste and smell. [1] [22] Among those who develop symptoms, approximately one in five may become more seriously ill and have difficulty in breathing.
The CDC and WHO assessed that the "public health risk posed by this variant is low compared with other circulating variants". [23] Moderna and Pfizer have stated that their COVID-19 vaccines targeted at the omicron variant remain effective against BA.2.86 [ 24 ] and Novavax has stated its updated protein-based COVID-19 vaccine appears effective ...
KP.3 is the most common COVID-19 variant in the U.S. right now. This strain descended from JN.1, which was the dominant variant this winter. Doctors do not expect it to cause more severe illness.
The new "FLiRT" COVID-19 variants, including KP.3 and KP.2, are spreading in the United States. Will there be a summer surge? Experts discuss transmission, symptoms, and vaccines.