>>353 >overview >It is intended for public health and infection prevention and control (IPC) professionals, healthcare managers, healthcare workers and community health workers.
>>482 PDF全文の冒頭 ＞Background This document provides rapid advice on the use of medical masks in communities, at home, and in health care facilities in areas that have reported outbreaks of COVID-19. It is intended for public health and infection prevention and control (IPC) professionals, health care managers, health care workers, and community health workers.
この場合のat home とは、医療・介護従事者つまりプロが、患者の家で 在宅医療もしくは訪問医療をする場合のことでしょ。