Cookies on this website
We use cookies to ensure that we give you the best experience on our website. If you click 'Continue' we'll assume that you are happy to receive all cookies and you won't see this message again. Click 'Find out more' for information on how to change your cookie settings.

Researchers at the University of Oxford have today published in Preprints with The Lancet an analysis of further data from the ongoing trials of the vaccine. In this, they reveal that the vaccine efficacy is higher at longer prime-boost intervals, and that a single dose of the vaccine is 76% effective from 22- to up to 90-days post vaccination.

Researcher working on the vaccine in the lab © John Cairns
  • Analyses reveal single standard dose efficacy from day 22 to day 90 post vaccination of 76% with protection not falling in this three-month period
  • After the second dose vaccine efficacy from two standard doses is 82.4% with the 3-month interval being used in the UK. (82.4% effective, with a 95% confidence interval of 62.7% - 91.7% at 12+ weeks)
  • Data supports the 4-12 week prime-boost dosing interval recommended by many global regulators
  • Analyses of PCR positive swabs in UK population suggests vaccine may have substantial effect on transmission of the virus with 67% reduction in positive swabs among those vaccinated

Read the full story on the University of Oxford website

Similar stories

General anaesthesia should be available for dying patients - medical and ethical experts

General Research

General anaesthesia should be more widely available for patients at the end of their lives, according to Oxford experts in ethics and anaesthesia, according to a paper published by Anaesthesia (a journal of the Association of Anaesthetists).

Human challenge trial launches to study immune response to COVID-19

Clinical Trials Coronavirus COVID-19 General

Though the COVID-19 pandemic has now been active for a year, not much is known about what happens when people who have already had COVID-19 are infected for a second time.

Risk of rare blood clotting higher for COVID-19 than for vaccines

Coronavirus COVID-19 Research

COVID-19 leads to a several-times higher risk of cerebral venous thrombosis (CVT) blood clots than current COVID-19 vaccines.

Alternating vaccines trial expands to include two additional vaccines

Clinical Trials Coronavirus COVID-19 General

Researchers running the Com-Cov study, launched in February to investigate alternating doses of the Oxford-AstraZeneca vaccine and the Pfizer vaccine, have today announced that the programme will be extended to include the Moderna and Novavax vaccines in a new study.

Oxford medical students launch flagship raffle in aid of NHS heroes and lifesaving medical equipment

General

Tingewick, a society formed of medical students from Oxford University, are hosting a virtual charity raffle. With over 70 amazing prizes, ranging from Truck festival tickets to restaurant vouchers to bags of books and even a bike, the raffle is an exciting way to celebrate lockdown lifting by supporting many wonderful Oxfordshire businesses whilst raising lots of money for charity.