A new study suggests that the messenger RNA Covid vaccines did not impact overall mortality. However, the vaccines that did not have mRNA did seem to.
The study analyzed data from random clinical trials. They compared the overall deaths in the vaccinated group to placebo groups. The results showed that the mRNA vaccines from Pfizer and Moderna had no difference in overall mortality between the vaccinated versus the unvaccinated groups.
The vaccines that used adenovirus-vector, such as the Johnson & Johnson vaccine that was taken off the market, were associated with lower overall mortality.
This study was published before peer review in 2022, but the authors say that several journals refused to publish it without explanation.