婴幼儿患伤风感冒的机会特别多,上周患病毒感染、本周患细菌感染,说不定下周又有另一种病毒“光临”。总之,每周都要去医院。这种孩子的家长常常要求医生注射一支丙种球蛋白,求得一段时期的“太平日子”。丙种球蛋白是从健康人血液中提取的,包括各种免疫球蛋白。免疫球蛋白是非特异性的,其中所含的抗体不对某一种细菌或病毒具有特异的抗病作用,换句话说,就是针对性并不强。另外,丙种球蛋白中的各种免 Infants and young children have a particularly high chance of getting a cold and flu. Last week, they suffered from a viral infection and a bacterial infection this week. Maybe another virus will arrive next week. In short, go to the hospital every week. The parents of such children often ask doctors to inject a gamma globulin for a period of “peacetime.” Gamma globulin is extracted from healthy human blood and includes a variety of immunoglobulins. Immunoglobulins are nonspecific and the antibodies they contain do not have a specific disease-fighting effect on a particular bacterium or virus; in other words, they are not specific. In addition, gamma globulin in a variety of free