AstraZenecas COVID-19 vaccine has been granted emergency use authorisation in India as well as Argentina Dominican Republic El Salvador Mexico and Morocco for the active immunisation of adults. New vaccine efficacy results are reported now in The Lancet.
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The researchers would not project how much more the protection would drop over time but suggested that the efficacy of the two vaccines studied would converge within four to five months after the second shot.

Astrazeneca vaccine efficacy. The Oxford-AstraZeneca vaccine has reached over a billion doses worldwide but in Australia the rollout has been derailed due in part to confused messaging and changing advice about the vaccine. Walker was not involved in work on AstraZenecas vaccine which was initially developed by immunology experts at Oxford. COVID-19 Vaccine AstraZeneca received a conditional marketing authorisation valid throughout the EU on 29 January 2021.
People under the age of 40 are to be offered an alternative to the Oxford-AstraZeneca vaccine in the UK as a precaution after a review of all the latest evidence by vaccine. The vaccine was shown in clinical trials to be safe and effective at preventing symptomatic COVID-19 with no severe cases and no hospitalisations more than 14 days after the. The main trials showed that the vaccine has around 60 efficacy.
Most side effects are mild to moderate in severity and are gone within a few days. Investigators of four randomised controlled trials conducted in the UK South Africa and Brazil report pooled results of an interim analysis of safety and efficacy against COVID-19 of the OxfordAstraZeneca chimpanzee adenovirus vectored vaccine ChAdOx1 nCoV-19 AZD1222 in adults.
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