evidence: No causal association between the DTaP vaccine and sudden infant death syndrome (SIDS) Although cases of SIDS have occurred after the DTaP vaccine, there is no evidence to support the claim that the DTaP vaccine has caused these cases. Studies show that DTaP vaccines, and vaccination in general, are not associated with an increased risk of SIDS. Inaccurate: Studies show that the DTaP vaccine is not causally associated with SIDS. SIDS is not listed as a side effect (adverse reaction) to the vaccine.