People with the "hybrid immunity" of having been both fully vaccinated and previously infected with COVID-19 have the strongest protection against the virus, two new studies said on Friday.
PARIS, April 3 People with the “hybrid immunity” of having been both fully vaccinated and previously infected with Covid-19 have the strongest protection against the virus, two new studies said on Friday. After two years of a pandemic that has seen nearly 500 million people infected and.