Study: New COVID-19 Subvariants Evade Previous Vaccinations & Prior Infections By Jacqueline Howard, CNN   (CNN) Omicron subvariants BA.4 and BA.5 appear to escape antibody responses among both people who had previous Covid-19 infection and those who have been fully vaccinated and boosted, according to new data from researchers at Beth Israel Deaconess Medical Center, […]

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