A bottle of the COVID-19 vaccine.


This study is testing a vaccine to be used as a booster to prevent coronavirus infection (COVID-19).

It is sponsored by Gritstone bio, Inc and is being carried out by a team of researchers at Manchester University NHS Foundation Trust.


  • Aged 60+ years
  • Have received two or three doses of the Pfizer vaccine (Comirnaty)
  • Never had coronavirus



  • Receiving the study vaccine and keeping a symptom diary for 8 days afterwards
  • Attending a number of appointments over the 12 months study period.

Recruiting until

  • 30 June 2022

Want to take part or learn more?