AstraZeneca: Should under-30s get a second dose? Were side-effects inevitable?

After the announcement that under-30s will be offered an alternative to the Oxford-AstraZeneca vaccine over rare blood clot safety concerns, Mary Nightingale puts all your key questions to Science Editor Tom Clarke.

What should people under-30 already jabbed with AstraZeneca do about their second dose? What are the symptoms of blood clots and could aspirins help? Is vaccine mixing safe and were side effects inevitable?

Tom offers his guidance on all of the above and a lot more.