July 2023: Parts of Nigeria’s Borno state ran a preventive mass vaccination effort against yellow fever July 31, 2023
July 2023: Nigeria’s Lagos state implemented an outbreak response campaign against polio July 31, 2023
July 2023: Ecuador extended its nationwide vaccination campaign against measles, rubella and polio July 31, 2023
July 2023: Several provinces in eastern Afghanistan ran an anti-polio vaccination campaign July 31, 2023
July 2023: Burkina Faso kickstarted the second phase of a national immunization effort against polio July 31, 2023
