The news today that the MHRA has approved the AstraZeneca adenoviral ChAdOx1 nCoV-190 vaccine for use in the UK is excellent news for the Covid-19 vaccination programme. The results of the vaccine trial published in the Lancet earlier in December were encouraging, even if the overall efficacy of 70% was lower than the 90-95% being reported for mRNA vaccines from Pfizer-BioNTech and Moderna. The vaccine still prevented serious cases of illness amongst the recipients. The AstraZeneca vaccine is cheaper than the mRNA vaccines and can be stored in a conventional vaccine fridge. Hence, it is an easier vaccine to use in primary care and community settings, including in low and middle income countries. The most commonly reported adverse reactions from the vaccine were fatigue, headache, feverishness, and myalgia. More serious adverse events were rare and not believed to be directly related to the vaccine. One caveat for all the Covid-19 vaccines is that we don’t yet know how long the immunity...
Updates from Imperial College London's Professor of Primary Care & Public Health