Thursday briefing: Mix-and-match jab trial
Thursday briefing: Mix-and-match jab trial Warren Murray Top story: Pfizer dose 90% effective after 21 days © Photograph: Christopher Thomond/The Guardian Experts say the option of a different second Covid shot would make vaccine delivery more flexible and may generate stronger immunity. Hello, I’m Warren Murray – promise not to take up too much of your time. Volunteers are being sought for a world-first Oxford trial giving a first dose of one vaccine type and a second dose of another. It will recruit 820 people over the age of 50 to receive a first dose of either the O...
Source: msn.com