Nurse Susann Rettberg inoculates a local resident with the AstraZeneca vaccine against COVID-19, March 15, 2021, in Dippoldiswalde, Germany. Pfizer and others are mostly manufactured in the United States. The World Health Organization has also said “there is no indication of a link between the vaccine and blood clots, and that the vaccine can continue to be used while its investigation is ongoing.”ĪstraZeneca was the vaccine European countries ordered the most of, Longman reported, in part because it’s mostly manufactured in Europe. The EU's European Medicines Agency (EMA) said it is 'working closely with the company, with experts in blood disorders, and with other health authorities' in an ongoing investigation into the reported blood clots. So there is a lot of outrage, really, in Britain especially, about this happening.” “It is definitely fewer than people who die of COVID-19. “Whatever you believe that to be, it is still fewer than the number of people who get blood clots in the general population,” Longman said. AstraZeneca said the risk might be even lower. Longman said an EU study suggested one in 167,000 people who received the vaccine experienced blood clots. To overcome the pandemic, it is important that people get vaccinated when invited to do so.” AstraZeneca emphasized that it was “keeping this issue under close review, but available evidence does not confirm that the vaccine is the cause.