- Unvaccinated Illinois resident exposes unknown number of St. Louis visitors to measles KSDK
- Third measles case confirmed in Missouri as more info emerges about St. Louis case STLtoday.com
- Measles warning: Infected person visits St. Louis Aquarium, eatery FOX 2
- Measles case reported in New Madrid County KOMU 8
- Another measles case confirmed in Missouri First Alert 4