Thanh Hoa has suspended the use of a Pfizer Covid-19 vaccine batch after over 120 students were hospitalized following their inoculation. Since November 30, the central province has been vaccinating children aged 15-17 with the Pfizer Covid-19 vaccine. However, over 120 of the children were admitted to hospitals after exhibiting symptoms like nausea, high fever or breathing difficulties, the provincial Center for Disease Control (CDC) said Thursday.