[Source: Reuters]

Crowds of Palestinians gathered at medical centers in the south of the embattled Gaza Strip on Thursday for their children to be vaccinated against polio in the second stage of a campaign that has so far seen 187,000 youngsters inoculated.

The U.N. Palestinian refugee agency UNRWA said the campaign, taking place after Hamas and Israel agreed on limited pauses in their fighting, was so far successful but complex.

But the war continued elsewhere in the enclave, with Gaza health authorities reporting several people killed in Israeli airstrikes, including a hit on a hospital in central Gaza.

And despite the success of the polio campaign, diplomatic efforts to secure a permanent ceasefire in the war, the release of hostages held in Gaza, and the return of Palestinians jailed by Israel have faltered.

On Thursday, vaccinations began in Rafah and Khan Younis in the south of Gaza, both areas that have been battered by the war and that have hosted tens of thousands of people who have fled other parts.

One displaced Palestinian, Ikram Nasser, queuing with her son at a vaccination point, said the threat of polio had only increased people’s fears.

UNRWA said in a statement the vaccination campaign had moved to southern areas with teams mostly in Khan Younis.

Recipients will include people who had been forced by the Israeli military to leave Rafah, near the border with Egypt, where Israeli forces have been operating since May to hunt down Hamas fighters.

Later on Thursday, the Gaza health ministry said Israel refused to allow medical teams to areas east of the Salahuddin road to vaccinate children living in the eastern communities of the southern cities. The Israeli military said it was checking the report.

Health officials aim to reach 640,000 Gaza children for vaccination against polio in the campaign, which was launched after the discovery of a case of a one-year-old baby who was partially paralyzed.

This was the first known case of the disease in Gaza – one of the world’s most densely populated places – in 25 years. It re-emerged as Gaza’s health system has virtually collapsed and many hospitals have been knocked out of action due to the war.

Footage circulated by the Gaza health ministry showed large crowds of Palestinians arriving at medical facilities in Khan Younis to get their children vaccinated.

UNRWA said on Wednesday good progress was being made in rolling out the polio vaccine to children but a permanent ceasefire in the 11-month-old war was needed to ease humanitarian suffering