A court upheld Chicago's rule forcing police officers to get COVID shots. A union sought to stop it, but the court rejected the bid. Experts continue to argue the shots often provide more good than harm. The WHO now pushes harder to fight cervical cancer with vaccines. That goal fits into bigger health plans. A new infant mortality study looks at how swelling might play a part. Reports also mark how U.S. vaccines have transformed health care for two and a half centuries. These varied efforts show how shots keep helping people avoid harm.