From VOA Learning English, this is the Health Report.
The World Health Organization has declared the Pakistani city of Peshawar the world's "largest reservoir" of endemic polio virus. And WHO officials fear Pakistanis could face travel restrictions unless steps are taken immediately to stop the disease from spreading.
Researchers studied all the cases of poliomyelitis in Pakistan last year. The researchers found that almost every case could be linked genetically to the polio virus often reported in Peshawar.
FILE - An Afghan refugee receives polio drops from a Pakistani nurse at the Shamshatu refugee camp near Peshawar.
They added that all test samples collected from different parts of the city have shown the presence of the highly infections virus. Polio mainly affects children under 5 years of age.
The virus is passed through food or water. The virus reproduces in the body and later invades the nerve system. The disease can sometimes lead to paralysis with loss of muscle control in part of the body.
The WHO study found that 90 percent of Pakistan's Polio cases could be linked to the virus in Peshawar. In addition, 12 of the 13 polio cases in Afghanistan were also linked to the city.
Elias Durry serves as the WHO's emergency coordinator for polio in Pakistan. He says local officials need to take urgent action to strengthen vaccination campaigns. He says the situation in Peshawar not only threatens the gains Pakistan has made against Polio, but could also harm international efforts to stop the disease.
"Unless the polio eradication program in Pakistan is able to curtail the transmission in Peshawar, the expansion of the viruses to other places will not stop. So, it is critical that Peshawar, the way it is behaving now, really be able to find ways of interrupting these transmissions that have been consistent throughout the years," said Durry.
He also noted an increase in deadly attacks on vaccination campaign workers in and around Peshawar and in other areas.
Taliban militants often attack polio workers in Pakistan. The militants accuse them of being American spies or part of a plot to keep Muslims from having babies. Most of the attacks have taken place in Peshawar because the city is close to the country's tribal districts. Extremist groups have bases in those areas.
Elias Durry did not reject the possibility of other countries ordering travel and visa restrictions on Pakistan if there is no quick improvement in the situation.
In neighboring India, no polio cases have been reported for the past 3 years. Starting this month, all visitors to India from Pakistan are required to show a record of their polio vaccination.
And that's the Health Report from VOA Learning English. For more health stories, go to our website learningenglish.voanews.com. We welcome your comments. Our e-mail address firstname.lastname@example.org.
1.reservoir n. 水库；蓄水池
Various kinds of fish are being bred in the reservoir.
2.poliomyelitis n. [内科] 脊髓灰质炎；[医] 小儿麻痹症
By 1995 poliomyelitis had been totally eliminated.
3.vaccination n. 接种疫苗；种痘
Smallpox can be contained by vaccination.
4.curtail vt. 缩减；剪短；剥夺…特权等
He curtailed his speech.
1.He says local officials need to take urgent action to strengthen vaccination
take action to 采取行动
There's no immediate danger, no need to take urgent action.
We had to take action to protect the proprietary technology.、
塔利班武装分子经常袭击巴基斯坦的脊髓灰质炎接种人员，他们指责这些人员是美国的间谍，或是参与阻止穆斯林怀孕的阴谋。大多数袭击发生在白沙瓦，因为该市临近该国的部落地区 。极端组织的总部都在这里 。