Call for booster jab over ‘undetectable’ antibody response in some immunocompromised patients

A Pfizer/BioNTech Covid-19 vaccine being prepared (PA)

Two in five people who have impaired immune systems have a “low or undetectable” antibody response after being double vaccinated, a new study suggests.

While the vaccines appear to be active among all adults, UK researchers said their data supports a third coronavirus vaccine among groups who had absent or lower level antibody responses.