Gaza doctors process 200 days of war from devastated hospital's rubble
But after 200 days of war between Israel and Hamas militants, he now stands in its ruins.
"We are now in the middle of the rubble of this great hospital," Alewah, who returned to inspect the now charred emergency reception room, told AFP.
Following the outbreak of war, Al-Shifa became a safe haven for the thousands injured or fleeing the Israeli onslaught on the Palestinian territory.
"Every day, we received thousands of wounded," he said, recalling having to work without enough medical equipment or fuel for electric generators.
"We had picked up the habit of spending all our time here, as if it was our main residence."
But war came to Al-Shifa, with Israel launching multiple raids on the medical facility after accusing militants of operating a command centre from tunnels below.
The Israeli military said two weeks of fierce fighting last month killed over 200 militants and recovered weapons.
Hamas, which rules Gaza, denies using the hospital for military purposes.
Footage of the complex filmed by AFP after two weeks of siege between March 18 and early April shows a site laid to waste.
UN Human Rights Chief Volker Turk said he was horrified by the hospital's destruction and demanded an independent investigation.
"Hospitals are entitled to very special protection under international humanitarian law," he said.
Alewah said he was saddened by the destruction of a "cornerstone of health for the whole north of the Gaza Strip," calling on the international community and World Health Organization (WHO), which visited Al-Shifa to assess damages, to help rebuild.
"We're lacking operating theatres to treat patients, particularly patients on dialysis or those with heart conditions."
'Death'
A rehabilitation medical committee has already been put in place, its head, Marwan Abu Saada told AFP, adding that they were working on building an emergency department in another part of the hospital complex.
"We will not lose hope," he repeated, despite acknowledging the difficulty of the task at hand.
As many as 32 hospitals and 53 dispensaries are out of commission due to the war, according to the latest figures from the health ministry in Hamas-run Gaza, while 77,100 people are wounded across the territory.
"We want the war to end," said Adham Qneita, a resident of Rimal, a neighbourhood adjacent to the hospital.
Speaking in front of the devastation of flattened apartment buildings, he said he wished "only for death".
"Nobody cares about us," he told AFP.
The war between Israel and Hamas erupted when the group's fighters launched an unprecedented attack on the country on October 7, resulting in the deaths of 1,170 people, mostly civilians, according to an AFP tally based on official Israeli figures.
Israel vowed to eliminate Hamas and its ensuing military offensive in Gaza has killed at least 34,183 people, most of them women and children, according to the Gaza health ministry.