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University of Oxford researchers have begun recruiting for the next phase in human trials of a COVID-19 vaccine in human volunteers.

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.

ChAdOx1 nCoV-19 is made from a virus (ChAdOx1), which is a weakened version of a common cold virus (adenovirus) that causes infections in chimpanzees, that has been genetically changed so that it is impossible for it to replicate in humans.

Read more on the University of Oxford website

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