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California's FLiRT-fueled COVID surge is continuing to spawn infections at a dizzying rate, with coronavirus levels in wastewater reaching some of the highest levels seen since 2022.
In California as of July 31, 37% of seniors had received the updated COVID-19 vaccine for the 2023–24 season, as did 18.7% of those age 50 to 64, and 10.1% of the youngest adults.
Of California's 58 counties, 38 are in the high COVID-19 community level. Some 16 million Californians live in those counties, accounting for 42% of the state's population.
Scanning electron micrograph of SARS virions. Severe acute respiratory syndrome (SARS) is the disease caused by SARS-CoV-1. It causes an often severe illness and is marked initially by systemic symptoms of muscle pain, headache, and fever, followed in 2–14 days by the onset of respiratory symptoms, [13] mainly cough, dyspnea, and pneumonia.
Illustration of a coronavirus virion in the respiratory mucosa, showing the positions of the four structural proteins and components of the extracellular environment. [15] The M protein is the most abundant protein in coronavirus virions. [8] [5] [4] It is essential for viral replication. [4]
The envelope (E) protein is the smallest and least well-characterized of the four major structural proteins found in coronavirus virions. [2] [3] [4] It is an integral membrane protein less than 110 amino acid residues long; [2] in SARS-CoV-2, the causative agent of Covid-19, the E protein is 75 residues long. [5]
The combination of initial and recurring infectivity carries enormous implications for how the pandemic will continue to play out.
"COVID-19 remains a health threat, but it makes far fewer people seriously ill because our immunity is stronger, with over 98% of the U.S. population now having some protective immunity against ...