I’ve only seen this Source from the Mirror and have not seen or heard anything from other sources regarding this. https://apple.news/A4laDt0tbSeOpwMoRY8J7Xg
I saw something on this last week - Astra Zenica are apparanly going ahead and manufacturing in the hope it will work. They must be fairly confident that they can get it through trials or I cant believe they would already be ramping up production https://www.bbc.co.uk/news/business-52917118 Slight concern from the Mirror piece which suggests the vaccine will work best on younger people thats sort of the wrong way round
I would imagine most vaccines work better on younger people though? And if it works on them, it will.still be of benefit to the population as a whole.
A 2018 US study by Russell, Chung et al, published in the journal "Vaccine" showed fairly stable levels of effectiveness over 5 different seasons of flu vaccinations irrespective of age. However, the H3N2 strain resulted in poorer effectiveness across all age groups, which does raise the possibility of limited effectiveness being an issue. I now know of 5 colleagues who work in Radiology departments who have all tested positive for the Covid-19 antibody from tests done in the last week, all have been asymptomatic. Of those 5, none of their family members in the same household tested positive, but 3 households have had members with symptoms that required isolation around Easter time. Exceptionally complex picture - how many asymptomatic people have had it, how many symptomatic (and possibly including some who have passed away) people have been clinically diagnosed with it but not actually had it? In balance, there is a margin of error with the testing too.