<p>Background<strong>: </strong>A public health surveillance system is an essential public health function defined by ongoing systematic collection, compilation, analysis, and dissemination of data on reportable diseases and other events that present a potential threat to public health security. Our objective was to describe core process, Supportive function and evaluate key attributes of the public health surveillance system at Kelalla district, South Wollo zone, Amhara region, Ethiopia,2023.</p><p>&nbsp;</p>