Israel-Gaza updates: Poliovirus detected in wastewater across Gaza, WHO says

The World Health Organization has registered more than 1,000 attacks on health care facilities in the occupied Palestinian territories of the West Bank and the Gaza Strip since the Oct. 7 terror attacks in Israel sparked the ongoing war in Gaza, the agency’s top official in the region said in a press briefing on Wednesday.

There are currently no functional hospitals in Gaza’s southernmost city of Rafah, following Israel’s recent offensive there, according to Dr. Rik Peeperkorn, the WHO representative for the West Bank and Gaza.

Peeperkorn highlighted the urgency of allowing critically ill patients to leave the war-torn enclave, stating that around 10,000 patients in Gaza still require urgent evacuation –- half of whom are suffering from severe trauma, including spinal injuries and amputations.

-ABC News' Camilla Alcini

The Israel Defense Forces has carried out 37,000 airstrikes on Gaza and targetted more than 25,000 terrorist infrastructures and launch sites since Hamas' Oct. 7 attack, the IDF said Tuesday.

The IDF also acknowledged carrying out strikes on hospitals, schools and humanitarian shelters throughout the Gaza Strip, claiming to target "terrorists who are located and based in sensitive sites," the IDF said in a statement.

At least 23 people were killed and 73 others were injured after Israel struck a UNRWA school in a designated safe zone where displaced people are sheltering. Five UNRWA schools have been hit in the last 10 days, according to the UNRWA.

"UN facilities must be protected at all times. They must never be used for military or fighting purposes. No one is safe in Gaza, wherever they are. The people of #Gaza are children, women & men who have the right to live," the UNRWA said Tuesday.

In another strike on a safe zone in Mawasi Khan Yunis, at least 17 people were killed and 26 others were injured.

The Israel Defense Forces confirmed that it struck the school, alleging it struck terrorists who were operating in a UNRWA school.

-ABC News' Will Gretsky

Israel has carried out a strike on Nuseirat refugee camp, where internally displaced Palestinians have been told to shelter, for the second day in a row, according to Gaza Civil Defense.

This is the sixth school -- a designated safe zone -- to be targeted by Israeli Defense Forces' airstrikes in one week.