Massive study checks if pregnancy vaccine harms mom or baby

This study aims to check if getting the Adacel vaccine (which protects against tetanus, diphtheria, and whooping cough) during pregnancy is safe for both the pregnant person and their baby. Researchers will review the medical records of about 365,000 people to compare pregnancy and birth outcomes between those who got the vaccine and those who did not. The goal is to see if the vaccine is linked to any increased risks of problems like preterm birth, low birth weight, or other complications.