Why Some People Might Never Get COVID

The researchers compared the polymerase chain reaction (PCR) testing status and immune response of 52 people after COVID-19 exposure from someone in their household. The 26 people who tested negative had a higher frequency of cross-reactive memory T-cells compared to the 26 people who eventually tested positive for the virus.4



“Specific memory T-cells are one of the primary cellular vehicles of immunity,” J. Wes Ulm, MD, PhD, who was not involved with the research, told Verywell. “It’s quite intriguing that these individuals are essentially immune to COVID-19 development, at least partially, despite not having been vaccinated or [not having] experienced a prior infection.”
https://www.verywellhealth.com/never-covid-cohort-5223057

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