4 in 10 COVID-19 Patients in California Hospital Fully Vaccinated After Omicron Emergence: Study

This scanning electron microscope image shows SARS-CoV-2 (round blue objects), also known as CCP virus, the virus that causes COVID-19, emerging from the surface of cells cultured in the lab that were isolated from a patient in the United States. NIAID-RML via Reuters

Some four in 10 COVID-19 patients in a hospital in California during late December 2021 and most of January were fully vaccinated, according to a new study.

The percentage of fully vaccinated patients in an academic hospital in California climbed from 25 percent in the summer of 2021 to 40 percent after the Omicron virus variant became dominant in the United States, researchers said in the study, published by the Centers for Disease Control and Prevention’s (CDC) quasi-journal.