Polio cases down worldwide, trouble spots remain

The number of polio cases worldwide reached a record low in 2012, giving experts confidence that the disease can finally be eradicated, according to presentations made Tuesday at a major US conference.

Just 177 cases were recorded globally through October 2012, down from 502 during the same period last year, said virologists attending the annual meeting of the American Society of Tropical Medicine and Hygiene in Atlanta.

But the experts said challenges in the fight against polio remain, citing a doubling this year of the number of cases in Nigeria, and persistent difficulties in Pakistan.

Pakistan, Nigeria and Afghanistan are the only countries where polio remains endemic. Experts are trying to eliminate polio from those places, making it only the second disease after to be completely eradicated.

Steven Wassilak, a polio expert at the US Centers for Disease Control and Prevention, said new data from Pakistan shows that one of the two types of wild prevalent in the South Asian country is close to being wiped out.

"There have not been any Type 3 cases reported for six months, which is the longest gap in incidence there to date," Wassilak said, according to a press release.

But Anita Zaidi, a at Aga Khan University in the Pakistani city of Karachi, said wary parents are still refusing to allow their children to take part in vaccination drives—a problem that is not easily solved.

"That is a big challenge and not something that can be overcome only by expanding immunization campaigns," Zaidi said, while noting the progress made in bringing vaccinations to .

Zaidi said Karachi was the only large city in the world that had failed to stamp out polio transmission, and condemned the killing of a health worker in the city involved in a vaccination drive.

Wassilak voiced hope that the problem of parental reluctance—which also exists in Nigeria—could be overcome, citing India as an example. That country has not reported a polio infection since January 2011.

"It requires working more closely with community leaders and greater political commitment at all levels, which is what we are seeing in both Pakistan and Nigeria," he said.

Experts are worried about cases in Nigeria, as in the past, infections have spread to Sudan, Chad and 23 other countries.

The highly infectious disease affects mainly those under the age of five and can cause paralysis in a matter of hours. Some cases can be fatal.

add to favorites email to friend print save as pdf

Related Stories

UN polio suspension hits 22,000 Pakistan children

Aug 02, 2012

Around 22,000 Pakistani children are at risk in Karachi after the World Health Organization suspended polio vaccinations over a spate of bloody shootings, a UN official warned Thursday.

Predictive model developed for polio

Oct 18, 2011

Using outbreak data from 2003-2010, Kathleen O'Reilly of Imperial College London, UK and colleagues develop a statistical model of the spread of wild polioviruses in Africa that can predict polio outbreaks six months in advance. ...

Polio eradication hinges on four countries

Oct 13, 2006

Successfully global eradication of polio depends four countries' efforts to vaccinate children, the Swiss-based Advisory Committee on Polio Eradication said.

Recommended for you

Ebola virus in Africa outbreak is a new strain

15 hours ago

The Ebola virus that has killed scores of people in Guinea this year is a new strain—evidence that the disease did not spread there from outbreaks in some other African nations, scientists report.

User comments