Huge adverse event analysis released yesterday. This analysis looked at up to 42 days post-vaccination for outcomes in almost 12 million vaccinations. There is a myth that adverse events may appear years or months later – but it isn't true. It just doesn’t happen with vaccines, where temporal effects are extremely short-term, usually within hours or days. Especially mRNA vaccines, where mRNA itself is unstable and broken down within an hour outside of cells, which it is outside of cells when injected via vaccination. This study shows that as there were no differences in excess adverse events (statistically, none) between 1 to 21 days compared to 22 to 42 days. Therefore, it's reasonable, knowing what we know about vaccines and mRNA vaccines specifically, to project these findings out and not expect any longstanding adverse effects. Needless to say, researchers will continue to monitor.
The myocarditis cluster in younger adults is interesting and has been mentioned in the literature. Even so, 6 excess cases in 1 million person years is absurdly low, lower than most rare adverse events associated with other medication. Overall, factoring in other age groups, no excess cases were concluded.
Surveillance for Adverse Events After COVID-19 mRNA Vaccination - PubMed