Russian news today reports:
The US has stopped production of the AstraZeneca vaccine at a plant in Baltimore, where 15 million doses were spoiled due to an error in the manufacture…
…Emergent BioSolutions, which has partnered with both AstraZeneca and Johnson & Johnson, accidentally mixed ingredients in two different vaccines…
https://ria.ru/20210404/astrazeneca-1604140030.html
the russian article refers to The New York Times
“…there is deep concern about the safety of the AstraZeneca vaccine, amid a health scare that has prompted some European countries to restrict its use.”
https://www.nytimes.com/live/2021/04/03/world/covid-vaccine-coronavirus-cases
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So, those blood clots were definitely NOT usual. As to “the over-reaction by some nation states” which Kempe found “utterly baffling” – well, those nation states have really excellent Med Stats department, that they were able to trace this “insignificant” deviation.