World Health Organization (WHO) workers prepare a center for vaccination during the launch of a campaign against an outbreak of Ebola in the port city of Mbandaka, Democratic Republic of Congo, May 21, 2018.
© 2018 Kenny Katombe/Reuters
World Health Organization (WHO) workers prepare a center for vaccination during the launch of a campaign against an outbreak of Ebola in the port city of Mbandaka, Democratic Republic of Congo, May 21, 2018.