Thirty-one students at an elementary school in Vietnam’s Central Highlands had symptoms such as dizziness, headache, and nausea after being given balloons by strangers. The incident was recorded at Ly Tu Trong Elementary School in Buon Trap Town, Krong Ana District, Dak Lak Province. According to the report of Ly Tu Trong Elementary School, four strangers, including three women and one man, were giving balloons to students in front of the school on Wednesday afternoon. Thirty-one students at an elementary school in Vietnam’s Central Highlands had symptoms such as dizziness, headache, and nausea after being given balloons by strangers. The incident was recorded at Ly Tu Trong Elementary School in Buon Trap Town, Krong Ana District, Dak Lak Province.