AstraZeneca vaccine 100% effective in preventing serious illness — study

The Oxford-AstraZeneca coronavirus vaccine has been shown to be 100 per cent effective in preventing serious illness in people.

A researcher in a laboratory at the Jenner Institute in Oxford, England, works on the coronavirus vaccine developed by AstraZeneca and Oxford University. (Photo: John Cairns/University of Oxford via AP)

The results come from a long-awaited US trial which also showed that it is 79 per cent effective at stopping symptomatic coronavirus and showed no safety issues regarding blood clots. In speaking to its effects on preventing serious illness, the study showed that it eliminated hospitalisations and deaths, including among older people.

The latest affirmation of the vaccine’s effectiveness will aid perception of its safety following reports of it causing clotting in a few cases, which has prompted several countries to suspend use of the vaccine.

Co-designer of the vaccine, Professor Sarah Gilbert, said “In many countries and across age groups, the vaccine is proving a high level of protection against COVID-19.”

The study included over 32,000 volunteers, mostly from the US with some participants coming from Chile and Peru.