Editor's Note
The Centers for Disease Control and Prevention, on January 19, released a study showing that in New York and California, both vaccination and prior infection offered protection against COVID-19, but those who had recovered from COVID-19 were less likely than vaccinated individuals to get infected during the Delta wave.
Among the findings:
Further studies are needed to establish duration of protection from previous COVID-19 infection by variant type, severity, and symptommatology, including for the Omicron variant, the researchers say.
Read More >>