Nevertheless, around 2.4 million children under 5 years are still dying every year from such diseases, particularly measles, neonatal tetanus, tuberculosis, pertussis, poliomyelitis and diphtheria.

不过，每年5岁以下儿童大约240万死亡仍然死于传染病，尤其是麻疹，新生儿破伤风，肺结核，百日咳，脊髓灰质炎和白喉。

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Particularly with measles, one of the most contagious diseases, outbreaks will occur unless 94 percent or more of the population is vaccinated, according to Bloom.

布鲁姆表示，特别需要注意的是水痘，它是最具传染性的疾病之一，除非94%或更多的人接种了疫苗才能避免大规模的爆发。

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Measles is particularly dangerous in young infants but anyone can get the disease at any time.

BBC: Long shadow cast by MMR scare

But, he argues, chickenpox and measles can both still be very serious diseases, particularly if there are complications.

BBC: Why do parents buy chickenpox lollies?

It added that it can be difficult to diagnose measles because many of the symptoms are similar to other viral illnesses particularly in the early stages.

BBC: Swansea measles: Clinic quizzed over single jab claims