Twenty Iranian schoolgirls were transferred to hospital in the north-western city of Tabriz, an official said, after the latest in a wave of poisoning attacks that have sickened thousands of pupils across the country over more than four months.The head of the emergency service in West Azerbaijan province said the girls were treated after suffering shortness of breath, the news agency ISNA reported on April 4. The school poisoning occurred in Tabriz’s Baghmisheh Town a day after Iranian schools had resumed classes following the Persian New Year break.Since November 2022, more than 5,000 students have suffered symptoms including nausea, fainting. headaches, coughing, breathing difficulties and heart palpitations, with many requiring treatments in hospital.