Received: 7 November 2020
Accepted: 18 May 2021
First Online: 10 June 2021
: The authors declare that they have no competing interests.
: This study was part of an outbreak response, an official approval was obtained from the Ministry of Public Health Population of Yemen and an official letter was sent to Shabwah Governorate Health Office to conduct this investigation by the Field Epidemiological Training Program. The consent was obtained from all participants. The participants were less than 18 years, the consent was obtained from their parents. Confidentiality of data was assured and ensured.
: Not applicable.