On 18 June 2017, the Nigerian Ministry of Health notified World Health Organization (WHO) of an outbreak of hepatitis E located in the north-east region of the country. The first case was detected on 3 May 2017 in Damasak, a locality at the border with the Republic of the Niger. Samples were collected from the case and sent to laboratory for confirmation. Cases were later reported in Ngala, one of the local government areas in Borno State that borders Cameroon. As of 2 July 2017, 146 confirmed and suspected cases were reported including 21 confirmed cases.