A new study published in Diabetologia investigated the incidence of type 1 diabetes in children who received the rotavirus vaccine. While the study initially observed an 11% relative increase in new cases of type 1 diabetes after the vaccine's introduction, secondary analysis suggests the vaccine was not the cause.
Professor Saul Faust of the University of Southampton noted that the researchers were clear in their interpretation that the data does not necessarily suggest a causal link. Professor Adam Finn from the University of Bristol described the report as a "negative result," indicating it did not provide evidence that preventing rotavirus infection led to a reduction in type 1 diabetes.
Professor Alex Richter of the University of Birmingham cautioned against concluding a link between the vaccine and increased diabetes risk. She explained that when researchers looked at the data in different ways, including comparing vaccinated and unvaccinated children, the apparent increase was no longer statistically significant. She added that observing an increase after a vaccine programme starts does not automatically mean the vaccine caused it, highlighting that similar increases were seen around changes to other vaccination programmes.