2014年截止到5月23号，美国已发现288例麻疹病例。Measles is a highly contagious virus that spreads through the air by breathing, coughing or sneezing. 麻疹病毒传染性很强，通过呼吸，咳嗽或是打喷嚏等经由空气传染。
一项最新发表的社会学研究得出结论，Pregnancy seems to be contagious, and women tend to have children at the same time as their friends. 怀孕是会传染的，女性生育时间往往跟自己的朋友相仿。当然了，这里的传染不是真的接触传染，而是指受朋友影响。
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