Study: Oxford Covid-19 vaccine produces strong immune response from booster shot

A third shot of the Oxford-AstraZeneca Covid-19 vaccine produces a strong immune response, researchers said on Monday, adding that there was not yet evidence that such shots were needed, especially given shortages in some countries.

The Oxford University study found that a third dose of the vaccine increases antibody and T-cell immune responses, while the second dose can be delayed up to 45 weeks and also lead to an enhanced immune response...