A double dose of Covid-19 vaccines is almost as effective against the fast-spreading variant of the coronavirus first identified in India as it is against Britain’s dominant strain, English health officials said on May 22.

India’s export ban on Covid-19 shots risks dragging the battle against the pandemic “back to square one” unless wealthy nations step in to plug a gaping hole in the COVAX global vaccine-sharing scheme, health specialists said on May 20.

Two doses of the Oxford/AstraZeneca Covid-19 vaccine are around 85 percent to 90 percent effective against symptomatic disease, Public Health England (PHE) said on May 20, citing an analysis of real-world data from the rollout of the shot.

The Covid-19 vaccine of AstraZeneca Plc and Oxford University works well as a third booster dose, stepping up antibodies to the coronavirus spike protein among participants in a study, the Financial Times said on May 19.

President Joe Biden will send at least 20 million more Covid-19 vaccine doses abroad by the end of June, marking the first time the United States is sharing vaccines authorized for domestic use.

Pivotal data from Amgen’s and AstraZeneca’s NAVIGATOR Phase III trial show tezepelumab, a potential first-in-class human monoclonal antibody, reduced asthma aggravations and exacerbations requiring hospitalizations better than placebo in patients with severe asthma. 

Europe’s medicines regulator is reviewing reports of a rare nerve-degenerating disorder in people who received AstraZeneca’s Covid-19 shots, raising fresh questions about potential side effects of the vaccine.

Next year, people are likely to need an annual Covid-19 vaccination just like they need an annual flu shot. That prediction is made by researchers at six of Australia’s leading medical research institutions, based upon their study of the levels of neutralizing antibodies needed to confer protection against Covid-19.

The submission of U.S. approval for AstraZeneca’s Covid-19 vaccine was pushed back to mid-May, with the company citing the massive dataset as the cause.  

Several states in India ran out of vaccines against Covid-19, exacerbating a dire second wave of infections that has left hospitals and morgues overflowing while families scramble for increasingly scarce medicines and oxygen.