Funding for this research was provided by:
Direktion für Entwicklung und Zusammenarbeit
Bill and Melinda Gates Foundation
Spanish Agency for Development and Co-operation
UNDP/World Bank/WHO Special Programme for Research and Training in Tropical Diseases
Fondo de Investigaciones Sanitarias
Tanzania Ministry of Health and Social Welfare
Received: 23 February 2018
Accepted: 25 February 2021
First Online: 18 March 2021
: For the clinical surveillance system written informed consent was obtained before initiation of any study procedures. Protocols were approved by ethical committees of the Ifakara Health Research and Development Center (IHRDC) and later on the Ifakara Health Institute (IHI) and thereafter by the National Medical Research Co-coordinating Committees through the Tanzanian Commission of Science and Technology. With regard to data for the demographic surveillance system, verbal consent to participate was sought from the head of every household, and protocols were approved by the ethical committees of IHRDC and the National Medical Research Co-coordinating Committees through the Tanzanian Commission of Science and Technology.
: Not applicable.
: All authors declare no specific support from any organization for the submitted work; no financial relationships with any organizations that might have an interest in the submitted work in the previous three years; any other relationships or activities that could appear to have influenced the submitted work section. Furthermore the authors declare no non-financial competing interests on political, personal, religious, ideological, academic, and intellectual spheres.