A school in Kasba has been closed indefinitely after a teacher tested positive for Covid.

The teacher of Kasba Chittaranjan High School, who underwent the test at a private facility on Tuesday, had been visiting the campus since the resumption of in-person classes on February 12.

As he informed headmaster Anindya Chattopadhyay about the test report, the school authorities in consultation with the education department decided to shut down the campus till the situation improved.

Schools across Bengal, which had shut down in March last year as a precaution against Covid, reopened for students of Classes IX to XII on February 12 following a nod from the state government.

Students of Classes XI and XII of Chittaranjan High School have been asked to undergo tests for Covid as the humanities teacher who tested positive gave lectures to them. The teacher is under home isolation.

An official of the education department said the school had been asked to take students of the two classes to a government hospital to undergo the tests.

“We plan to take them to the RG Kar Medical College and Hospital for the tests on Thursday. A guardian can take his ward to a private hospital,” headmaster Chattopadhyay said.

Students of Classes IX and X could also be asked to get themselves tested.

“But as those who are in Classes XI and XII came in immediate contact with the teacher, they have been asked to get tested at once,” he said.

An official of the department said two more teachers had been running a temperature and not been going to the school since Tuesday. “The teachers, too, must undergo the test,” said the official.

Asked about the two teachers, the headmaster said he did not have any such information.

A team from the Calcutta Municipal Corporation went to the school to sanitise the campus.

The closure at the school in Kasba has triggered uncertainty across institutions.

The headmaster of a school in south Calcutta said the reopening of schools was a must for the Class XII students as they will write the higher secondary practical exams from March 10. Till in-person classes resumed, they did not have the bare minimum hands-on training for the tests.

“Now, if guardians get scared and refuse to send their children to school, the Class XII students will suffer the most. How will they appear in the practicals? Some of the guardians have already got jittery,” he said.

A teacher wondered whether it was prudent to resume in-person instructions for the students of Classes IX to XI. “We wanted the schools to be reopened only for the students of Class XII science stream,” he said.