"Today we have additional evidence to show that these updated vaccines are protecting people against the latest COVID-19 variants," Dr. Brendan Jackson, head of the U.S. Centers for Disease Control and Prevention's COVID-19 response, told reporters in a briefing. Released last fall, the updated boosters target the BA.4 and BA.5 Omicron variants of the SARS-CoV-2 virus, which are no longer dominant. It showed that the updated vaccine helped prevent illness in roughly half of the people who had previously received two to four doses of the original COVID-19 vaccine, CDC said. The CDC said the updated vaccine worked similarly against BA.5-related infections and XBB/XBB.1.5-related infections. Given the findings, the CDC urged people to stay up to date on their recommended COVID-19 vaccines.

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