Global Study Finds Small Increase in Heart and Brain Conditions Linked to COVID Vaccines

The largest global study on COVID vaccine safety found small increases in neurological, blood, and heart-related conditions, including heart inflammation from mRNA shots and blood clots in the brain from viral-vector vaccines. While over 13.5 billion doses of COVID vaccines have been administered globally, a small proportion of people immunized were injured by the shots, sparking debate about their benefits versus harms. The study identified adverse events of special interest among 99 million vaccinated individuals in eight countries, aiming to identify higher-than-expected cases after a COVID shot. Additionally, a separate study conducted by the Yale School of Medicine found common symptoms in adults experiencing chronic post-vaccination syndrome, which aims to understand the condition and improve vaccine safety.