A 10-month-old baby in Gaza has been paralysed by the type 2 polio virus, the first such case in the territory in 25 years, the World Health Organization said on Friday.

United Nations (UN) agencies are appealing for urgent vaccinations of every baby.

The type 2 virus (cVDPV2), while not inherently more dangerous than types 1 and 3, has been responsible for most outbreaks in recent years, especially in areas with low vaccination rates.

UN agencies have called for Israel and Hamas to agree to a seven-day humanitarian pause in their 10-month-old war to allow vaccination campaigns to proceed in the territory.

"Polio does not distinguish between Palestinian and Israeli children," the head of the UN agency for Palestinian refugees (UNRWA) said on Friday in a post on X.

"Delaying a humanitarian pause will increase the risk of spread among children," Philippe Lazzarini added.

WHO Director General Tedros Adhanom Ghebreyesus earlier confirmed the case and at the time said the baby had developed paralysis in the lower left leg but was stable.

The WHO has announced that two rounds of a polio vaccination campaign are set to begin in late August and September 2024 across the densely populated Gaza Strip.

With its health services widely damaged or destroyed by fighting, and raw sewage spreading amid a breakdown in sanitation infrastructure, Gaza's population is particularly vulnerable to outbreaks of disease.

Gaza's health ministry first reported the polio case in the unvaccinated 10-month-old baby a week ago in the central city of Deir Al-Balah, an often embattled area in the war.

Hamas on August 16 supported a UN request for a seven-day pause in the fighting to vaccinate Gaza children against polio, Hamas political bureau official Izzat al-Rishq said on Friday.

Israel, which has laid siege to Gaza since a Hamas terror attack last October and whose ground offensive and bombardments have levelled much of the territory, said days later it would facilitate the transfer of polio vaccines into Gaza for around one million children.

The Israeli military's humanitarian unit (COGAT) said it was coordinating with Palestinians to procure 43,000 vials of vaccine — each with multiple doses — for delivery in Israel in the coming weeks for transfer to Gaza.

The vaccines should be sufficient for two rounds of doses for more than a million children, COGAT added.

As well as allowing the entry of polo specialists into Gaza, the UN has said a successful campaign would require transport for vaccines and refrigeration equipment at every step as well as conditions that would allow the campaign to reach children in every area of the rubble-clogged territory.

Poliomyelitis, a highly infectious virus primarily spread through the fecal-oral route, can invade the nervous system and cause paralysis.

Traces of polio virus were detected last month in sewage in Deir al-Balah and Khan Younis, two areas in southern and central Gaza that have seen hundreds of thousands of Palestinians displaced by the fighting seek shelter.

Children under five are particularly at risk.

Reuters