TOPSHOT - A community health worker administers an oral polio vaccine during a door-to-door polio immunisation campaign in Mbezi Makabe, Dar es Salaam on May 21, 2022. - The vaccination campaign is expected to reach 10.3 million under-five children across all regions of Tanzania, after its neighbour country of Malawi declared an outbreak of wild poliovirus on February 17, 2022. (Photo by ERICKY BONIPHACE / AFP)