摘要
这种仅能感染人类的微小病毒于1975年仅仅是由于科学好奇心而被发现，当时标号为B组第19号的血清对乙型肝炎表面抗原（HBsAg）总是呈假阳性结果，电镜下揭示其为直径22nm的裸露病毒颗粒。人微小病毒B19是儿科常见的感染俗称“击颊综合征”（传染性红斑）的病因。尚有多种动物微小病毒均不引起人类感染。
The virus and its discovery The only parvovirus capable of infecting humans was discovered in 1975 as a result of scientific curiosity, when a blood sample labelled‘panel B, serum number 19＇ that consistently gave a false-positive reaction for hepatitis B surface antigen revealed naked viral particles of 22 nm diameter on electron microscopy. Human parvovirus B19 has since been shown to be the cause of the common childhood infection‘slapped-cheek syndrome＇ （erythema infectiosum）. There are several animal parvoviruses, but none can infect humans.
