Mene Pangalos

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A health worker injects a dose of the AstraZeneca Covid-19 vaccine at Casernes Hospital in Barcelona, Spain. Photograph: Alejandro Garcia/EPA

AstraZeneca has reported a slightly lower efficacy rate for its Covid-19 vaccine after the results of an US clinical trial were criticised as outdated(...)

Covid-19: a vial of the Oxford vaccine. Photograph: John Cairns/Oxford/AFP via Getty

Another week, another vaccine. After so much hoping against hope for a vaccine against Sars-CoV-2, three come along almost simultaneously. It has cert(...)