KOLKATA: Bengal’s additional chief secretary (home) Alapan Bandyopadhyay quarantined himself on Wednesday after it emerged that he had briefly met the lady bureaucrat whose 18-year-old London-returned son on Tuesday became the state’s first confirmed Covid-19 case.Bandyopadhyay’s wife, Calcutta University vice-chancellor Sonali Chakravarti Banerjee , also did not venture out of their home, while the doctor who had first examined the teenaged patient was placed under home quarantine.As the search for secondary contacts of the patient continued, there was some reassuring news from the Beleghata Infectious Diseases Hospital as the boy’s parents and the family’s two drivers tested negative for Covid-19.Officials said the patient himself was doing fine, but there was concern over how the family’s alleged carelessness between Sunday and Tuesday left many others potentially exposed to the virus.Apart from Bandyopadhyay, the list of those at risk includes several home department staffers and a Kolkata Municipal Corporation official who met the patient’s mother at the state secretariat on Monday. Several residents of Nadia who were treated by the Covid-19 patient’s paediatrician father on Monday and Tuesday may have also been put at risk.CM Mamata Banerjee did not hide her anguish at the slip-up. “We welcome citizens who are returning from abroad. But we do not welcome the virus. Those coming from abroad should undergo medical tests. It applies to everyone, whether the person is a VIP or an LIP (less important person),” she said.“I do not support those who do not go to a doctor and roam about, enter shopping malls and visit parks. One cannot skip the mandatory check-up just because someone in the family is an ‘influential’ person,” she said. Mamata advised "extra caution" for the next two weeks.