evidence: One example is this video in which entrepreneur Steve Kirsch—who has repeatedly made false claims about vaccines—claimed that vaccines harm children and "are causing chronic disease in America", and that "The fully unvaccinated kids are always healthier". He added, "It’s not just the COVID vaccines; it’s every single one of them". [...] Kirsch’s first reference is a study by bioinformatician James Lyons-Weiler and pediatrician Paul Thomas supposedly showing that fully unvaccinated children are healthier than vaccinated children. The study was published in the International Journal of Environmental Research in November 2020. However, it was retracted by the journal in July 2021 because "the conclusions were not supported by strong scientific data". [...] Kirsch’s claim that vaccination leads to chronic diseases is also unsubstantiated and contradicted by scientific evidence, as Health Feedback explained in earlier reviews. Robust studies found no association between vaccines or their ingredients with poorer health or with conditions such as asthma, infections, autoimmune diseases, cognitive delay, autism spectrum disorder, and attention deficit/hyperactive disorder, among others[6-12].