Study Design and Participants
The Sarawak Heart Centre cardiology COVID taskforce team led this cross-sectional surveillance using convenient sampling method. It was conducted over a 3-week period from early April 2020 to mid-April 2020. Healthcare and supporting staff who works in the cardiac clinic, invasive catheterization lab, non-invasive catheterization lab, radiology unit, coronary care unit and cardiac rehabilitation wards, and emergency department were recruited after approval by the respective head of unit. Staff from the cardiothoracic team, rehabilitation clinic, pharmacy, general administration unit, and other non-cardiology wards such as geriatric were not included.