Policy changes in Mississippi have weakened longstanding vaccine requirements. A recent Guardian report links the shift to a resurgence of preventable diseases, including rising whooping cough cases and a child death. Once a state with high immunization coverage, Mississippi is now facing renewed public health risks. Advocacy networks connected to Robert F. Kennedy Jr. have supported these changes and are pursuing similar efforts nationwide. As related lawsuits expand across multiple states, the debate over vaccine policy continues to grow. Read more here.