Prior Covid infection more protective than vaccination during Delta surge: US study

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WASHINGTON — People who had previously been infected with Covid-19 were better protected against the Delta variant than those who were vaccinated alone, suggesting that natural immunity was a more potent shield than vaccines against that variant, California and New York health officials reported on Wednesday (Jan

Protection against Delta was highest, however, among people who were both vaccinated and had survived a previous Covid infection, and lowest among those who had never been infected or vaccinated, the study found.

"The evidence in this report does not change our vaccination recommendations," Dr Ben Silk of the CDC and one of the study's authors told a media briefing.For the study, health officials in California and New York gathered data from May through November, which included the period when the Delta variant was dominant.

"Before the Delta variant, Covid-19 vaccination resulted in better protection against a subsequent infection than surviving a previous infection," he said. The analysis did not include information on the severity of initial infection, nor does it account for the full range of illness caused by prior infection.

 

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