London: Protection against COVID-19 offered by two doses of the Pfizer/BioNTech and the Oxford/AstraZeneca coronavirus vaccines begins to fade within six months, underscoring the need for booster shots, according to researchers in Britain. After five to six months, the effectiveness of the Pfizer jab at…
Vaccines against Covid-19 are less effective against the delta variant, a large U.K. study showed in results that may fuel a push for booster shots for fully vaccinated people. Pfizer Inc. and BioNTech SE’s messenger RNA vaccine lost effectiveness in the first 90 days after full vaccination, though that shot and…
London: Total antibody levels start to wane six weeks after complete immunisation with Pfizer and AstraZeneca vaccines, and can reduce by more than 50 per cent over 10 weeks, according to study published in The Lancet journal. The researchers from University College London (UCL) in the UK noted that if the…
AstraZeneca said on Friday the European Union had lost a legal case against the pharmaceutical firm over the supply of COVID-19 vaccines, with a court in Brussels rejecting an EU request for more deliveries by the end of June. But European Commission President Ursula von der Leyen said Friday’s ruling supported…