Federal and Kaiser Permanente researchers combing the health records of 6.2 million patients found no serious health effects that could be linked to the 2 mRNA COVID-19 vaccines.The study published September 2 in JAMA reports the first comprehensive findings of the Vaccine Safety Datalink (VSD), which studies patient records for 12 million people in 5 Kaiser Permanente service regions along with HealthPartners in Minneapolis, the Marshfield Clinic in Wisconsin, and Denver Health. The work is supported by the Centers for Disease Control and Prevention (CDC). “These results from our safety surveillance are reassuring,” said lead author Nicola Klein, MD, PhD,...