Covid-19 and its variants. Seven existing vaccines are to be tested in the Cov-Boost trial to see which jabs could be used in any forthcoming autumn vaccination programme.
Some 2,886 people aged 30 and older are being recruited at 18 NHS sites from London to Glasgow, with the first booster jabs administered in early June.
Scientists want people who received their first dose of either Pfizer/BioNTech or AstraZeneca in December or January to sign up, and hope people aged 75 and over will also come forward.Experts believe that all seven vaccines will boost immunity, and lab studies will check their response to variants circulating in the UK, including those from India, Kent and South Africa.The £19.3 million clinical trial will test the Pfizer.