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在许多发展中国家,官方报告的脊灰炎数字往往不能反映出该病的真实情况。例如,印度卫生部估计,每15个脊灰炎病例中,只有1个报给卫生当局,由于疫情报告不健全,因而认为脊灰炎只是个发达国家的问题。据说由于婴儿死亡率下降,麻痹型脊灰炎发病率却可能上升。可是,印度和其他婴儿死亡率超过100‰(这个率相当于北美和北欧的8～10倍)的发展中国家的调查表明,麻痹型脊灰炎在许多发展中国家是个严重的问题。
In many developing countries, official reports of polio numbers often do not reflect the true nature of the disease. For example, the Ministry of Health estimates that only one out of every 15 cases of polio reported to the health authorities, polio is considered to be a problem in developed countries because of the poor reporting of the epidemic. It is said that the incidence of paralytic polio may increase due to the drop in infant mortality. However, surveys in developing countries that have infant mortality rates in excess of 100 per 1,000 in India (eight to 10 times those in North and North Europe) indicate that paralytic polio is a serious problem in many developing countries.