Following the rollout of COVID-19 vaccines, concerns quickly arose over whether they could increase the chances of deadly blood clotting events. Now, a huge study involving over 29 million people has found a slight increase in the risk of blood clots following both the Oxford-AstraZeneca vaccine and the Pfizer-BioNTech vaccine – but that the risk of these events is far greater following infection with COVID-19. The study involved the patient data of over 29 million people between December 2020 and April 2021. The data was analyzed and compared based on the vaccine they received, whether they had COVID-19, and whether...