This study is testing an investigational 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 doses of the Astra Zeneca vaccine before the beginning of June 2021
  • Never had a positive test for coronavirus


  • Manchester Royal Infirmary (M13 9WL, part of Manchester University NHS Foundation Trust)


  • Receiving the GRT-R910 vaccine and keeping a symptom diary for 8 days afterwards
  • Attending a number of appointments over the 12 months study period.

Recruiting until

  • 31/12/2021

Want to take part or learn more?