Air Pollution Linked to Reduced COVID Vaccine Efficacy, Study Finds

A recent study conducted by Australian researchers has found fundamental differences in immune responses between the AstraZeneca and Pfizer COVID-19 vaccines. The AstraZeneca vaccine elicited an unexpected memory-like response, potentially explaining its rare association with blood clotting, while the Pfizer vaccine induced stronger B and T cell activity. Booster doses, particularly mRNA ones, were found to be crucial for enhancing immune responses. The study also found that feeling unwell after a vaccine dose may in fact be linked to its effectiveness.