People who previously contracted Covid-19 have about the same level of protection against getting the disease as those fully inoculated with two key vaccines, according to the findings of a study published Monday which adds to a growing and sometimes contradictory body of research on natural immunity.

The study published by the U.K.’s Office of National Statistics (ONS) looked at more than 8,000 positive coronavirus tests across Britain between May and August, when delta was the dominant variant.

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