infectious disease; contagious or communicable disease caused by pathogens such as bacteria or viruses

the study of infectious diseases and their medical treatment; infectiology

acute infectious disease; an illness that develops rapidly and spreads easily from person to person

Infectious disease that must be reported to health authorities for monitoring according to health regulations, but is generally less severe than a [[法定传染病|法定傳染病|fa3 ding4 chuan2 ran3 bing4]]

legally mandated infectious disease that must be reported to health authorities, typically representing the most severe category of public health risks