Oxford Researchers Say They Developed Blood Test COVID-19 Vaccine Efficacy Predictor

Researchers at Oxford University said on June 24 that they have developed a method to estimate the efficacy of COVID-19 vaccines by a blood test.

Oxford University in Oxford, United Kingdom, on Sept. 20, 2016. Carl Court/Getty Images

Researchers at Oxford University said on June 24 that they have developed a method to estimate the efficacy of COVID-19 vaccines by a blood test.

The researchers said the method “can be used to extrapolate efficacy estimates for new vaccines where large efficacy trials cannot be conducted,” but cautioned that more work is needed to assess correlates for emerging variants.