AstraZeneca will likely re-test Covid-19 vaccine, CEO says after admitting an error in the first trial

AstraZeneca announced on Monday that its vaccine was up to 90% effective at preventing...

How to interpret the 'vaccine efficacy' rates of coronavirus vaccines

Vaccine efficacy is a metric that measures how well cases of an infectious disease, like...

The creator of the Oxford vaccine is a mom to triplets. Her children participated in the trial.

The vaccine's creator, Sarah Gilbert, had faith in its efficacy from the start — even...

AstraZeneca slides after announcing its Covid-19 vaccine candidate is 70% effective

The Oxford/AstraZeneca vaccine is cheaper to produce than Pfizer and Moderna's, but is...

Inside Covid-19 vaccine airlift: How carriers plan to distribute globe's soon-to-be most valuable drugs

While pharmaceutical companies rush to develop their life-saving vaccines, cargo carriers...

Moderna's CEO says vaccines aren't a 'silver bullet,' people must still social distance, wear masks

Wearing a mask and social distancing are the "best weapon" to control the virus,...

Oxford's Covid-19 vaccine is safe and produces an immune response in older adults, trial results suggest

Results of Phase 3 trials — which will show whether the Oxford University vaccine can...

Kids may produce a weaker antibody response to Covid-19 — it could be why their infections are milder

Children may fight off the virus before it has a chance to destroy their cells or...