Received: 4 August 2021
Accepted: 18 April 2022
First Online: 29 April 2022
: As these data were collected by surveillance staff, and the use of such data is part of the national surveillance activities, the study did not require formal ethical review. Official permission to perform this study was obtained from Ministry of Public Health and Population. The authors confirm that all methods were performed in accordance with the relevant guidelines and regulations in the county. The study did not involve experiments on the human subject or human participants under the age of 18 years. No human studies are presented in this manuscript.
: This study does not include any identifiable human images or data and thus does not require consent to publish.
: The authors declare that they have no competing interests.