“避痘出宫”是古时宫廷里对天花这种疾病常见的防范措施,幼年康熙因为得过天花并有幸存活,所以当上了皇帝。天花是那种人一辈子只可能得一次的疾病。其实不止天花,麻疹、水痘、炸腮(流行性腮腺炎)……它们对人来说都是一次得过便终生免疫。为什么会如此呢?这是由于身体在初次感染时便对它们产生了记忆,对第二次感染有强烈的反应,会产生大量抗体使疾病的症状不表现。而抗体就是那些只能与特定物(抗原)结合的特殊蛋白质(免 “Anti-acne out of the palace” is the ancient palace of the smallpox disease common precautionary measures, young Kangxi because of smallpox and survived, so became the emperor. Smallpox is the kind of disease that can only be once in a lifetime. In fact, more than smallpox, measles, chicken pox and gills (mumps) ... all of them are lifelong immunizations once and for all. Why is that? This is because the body remembers them at the time of the first infection, reacting strongly to a second infection, producing a large amount of antibodies that do not show symptoms of the disease. Antibodies are those special proteins that bind only to specific objects (antigens)