Dr Ahmed Al-Qirm, at Al-Ahli Baptist Hospital, remarked to The New Arab, "They were all killed by Israeli bombing... but the hunger was clear on their faces."
The outbreak in the south of the country followed a reported drone strike on a power station, disrupting access to clean water in the city of Kosti.
Newly confirmed Health Secretary Robert F. Kennedy Jr. on Thursday accused US institutions of "stealing the health of our children".
The Ministry of Health has launched targeted campaigns to vaccinate against measles virus, urging the public "to trust the science."
The US' withdrawal from the World Health Organization will deal a major blow, as Washington is its biggest funder.
The WHO said on Sunday it had certified Egypt as malaria free, marking the elimination of a disease that had been present in the country since ancient times.
Health authorities warned that electricity generators at all Gaza health facilities will soon stop, saying this poses a major threat to patients' lives.
A campaign to vaccinate a final 200,000 children in north Gaza against polio began on Tuesday, despite a dire need for fuel, among other challenges.
There have been 14,750 diagnoses for acute malnutrition among children aged from six months to just under five years since mid-January, according to the UN.
An mpox surge in Africa prompted the World Health Organization on Wednesday to declare a public health emergency of international concern, its highest alarm.