So many lives in Gaza still hang in the balance.

In different wards of Nasser Hospital lie two 10-year-old boys, one shot by Israeli fire and paralysed from the neck down, another with a brain tumour.

Now that a fragile ceasefire is in place, they are among some 15,000 patients who the World Health Organization (WHO) says are in need of urgent medical evacuations.

Ola Abu Said sits gently stroking the hair of her son Amar. His family says he was in their tent in southern Gaza when he was hit by a stray bullet fired by an Israeli drone. It is lodged between two of his vertebrae, leaving him paralysed.

He needs surgery urgently, Ola says, but it's complicated. Doctors told us it could cause his death, a stroke or brain hemorrhage. He needs surgery in a well-equipped place.

Right now, Gaza is anything but that. After two years of war, its hospitals have been left in a critical state.

On Wednesday, the WHO coordinated the first medical convoy to exit Gaza since the fragile ceasefire began on 10 October. It took 41 patients and 145 carers to hospitals abroad via Israel's Kerem Shalom crossing, with ambulances and buses taking the group on to Jordan. Some have stayed for care there.

The UN agency has called for numbers of medical evacuations to be rapidly increased to deal with the thousands of cases of sick and wounded. It wants to be able to bring out patients through Gaza's Rafah border crossing with Egypt as it has done previously.

However, Israel has said it is keeping the crossing closed until Hamas fulfils its commitments under the terms of the Gaza ceasefire deal by returning the bodies of deceased hostages.

Since the ceasefire, hope has run out for many of the patients. Recent deaths in the hospital reflect an urgent need for more humane treatment options and a sustainable response to the healthcare crisis in Gaza.