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Covid Patients Show Key Immunity Gauge After Six Months in Study

  • All 100 people in study had T-cell responses after half a year
  • Findings may damp concern about whether vaccines will work
Coronavirus covid-19


A crucial type of defensive blood cell persists for at least six months in people after Covid-19, even in those who had no symptoms, in a new study that may ease concern about waning immunity and its implications for a vaccine.

The research on 100 people shows that all had T-cell responses against a range of the coronavirus’s proteins, including the spike protein used as a marker in many vaccine studies, after half a year. Those who experienced symptoms had levels that were at least 50% higher than those who didn’t.