Syndromic surveillance with monthly aggregate health systems information data for COVID-19 pandemic response in Neno, Malawi: a monitoring study oleh Moses Banda Aron, MPH, Emilia Connolly, MPH, Fabien Munyaneza, MPH, Donald Fejfar, BSc, Isaac Mphande, MSc, George Talama, MBBS, Chiyembekezo Kachimanga, MBBS, Brown Khongo, MBBS, Isabel Fulcher, PhD