The University of Oxford on Friday started recruiting volunteers for a much larger clinical trial in the UK of its potential COVID-19 vaccine being developed with AstraZeneca.
Professor Andrew Pollard, head of the Oxford Vaccine Group, said: ‘The clinical studies are progressing very well and we are now initiating studies to evaluate how well the vaccine induces immune responses in older adults, and to test whether it can provide protection in the wider population. We are very grateful to the huge support of the trial volunteers in helping test whether this new vaccine could protect humans against the pandemic coronavirus.’
The phase I trial in healthy adult volunteers began in April. More than 1,000 immunisations have been completed and follow-up is currently ongoing.
The next study will enrol up to 10,260 adults and children and will involve a number of partner institutions across the country.
The phase II part of the study involves expanding the age range of people the vaccine is assessed in, to include a small number of older adults and children:
- Aged 56-69
• Aged over 70
• Aged between 5-12 years
For these groups, researchers will be assessing the immune response to the vaccine in people of different ages, to find out if there is variation in how well the immune system responds in older people or children.
The phase III part of the study involves assessing how the vaccine works in a large number of people over the age of 18. This group will assess how well the vaccine works to prevent people from becoming infected and unwell with COVID-19.
Adult participants in both the Phase II and Phase III groups will be randomised to receive one or two doses of either the ChAdOx1 nCoV-19 vaccine or a licensed vaccine (MenACWY) that will be used as a ‘control’ for comparison.
Read more via Oxford University