各种传染病有许多共同的特点,但不同的传染病具体的症状和体征则各不相同。传染病的共同特点主要有以下几方面。一、病程发展的规律性传染病的发展过程具有一定的规律性,每一种传染病从病原体侵入人体到发病、痊愈,可分为以下几期。 (一)潜伏期是指从病原体侵入人体至出现症状以前的一段时期。各种传染病的潜伏期长短不 There are many common features of various infectious diseases, but the specific symptoms and signs of different infectious diseases vary. The common features of infectious diseases are mainly the following aspects. First, the regularity of the course of disease development The development of infectious diseases has a certain regularity, each infectious disease from the pathogen invades the body to the onset, heal, can be divided into the following period. (A) the incubation period refers to the invasion from the pathogen to the human body before the onset of a period of time. The incubation period of various infectious diseases is not