evidence: Many popular posts on social media have shared results from the study, some lacking the context that the identified health problems are rare, that most aren’t new and that the vaccines have proven benefits. Various posts made unfounded claims, stating or implying that people should not have received the vaccines, that the risks outweigh the benefits or that the risk of the rare side effects is greater than was reported in the study. [...] "This thing was forced on people who faced almost no risk from Covid," said another widely read post. "It is completely unacceptable." The post shared statistics from the paper without making it clear that serious health problems after vaccination were rare and that risk varied by vaccine type and dose. [...] The researchers focused on 13 health problems that either had a known association with vaccination or for which there was some rationale to investigate whether there was an association. To determine whether the health problems were associated with vaccination, they compared the expected rates of the health problems — or the number of health events that should occur based on background rates in the regions studied — with the number of events they observed in the 42 days after vaccination.