Sir: Three children died and at least three others were hospitalised in critical condition in Nawabshah allegedly after being administered expired measles vaccines on Saturday, according to hospital officials and family members. Husnain Brohi, 5, Hania Noor, 6, and nine-month-old Qamar Din died at the Paediatrics Unit of Peoples University Medical Hospital (PUMH) while three other children, Zubair, 5, Jannat, 4, and Tania, 3, were said to be in serious condition. Junior doctors at PUMH who are treating the patients believe that expired vaccines are the reason behind the deaths, but district health officials have denied that the administered vaccines were expired and have ordered an inquiry into the matter. The officials said that samples had been collected from the bodies of the affected children for testing, and that nothing could be said about the reasons behind the deaths as yet. This has come as a shock to many of us who used to oppose those who hatched conspiracies about polio vaccination. This will serve as credence to those who are not letting Pakistan to be a polio-free country. This should be looked into and investigated. Or else this will deteriorate our problems. Raheel Arif Mandi Bahauddin Published in Daily Times, March 6th 2018.