46-year-old Mahipal Singh, a ward boy at the Moradabad district hospital died about 30 hours after he received the Covishield vaccine. While his family members have alleged that he fell sick only after receiving the vaccine, Additional CMO of Moradabad district, Dr Dinesh Kumar Premi, while speaking to Outlook, said that Singh died due to a heart attack and that his death has nothing to do with the vaccine. Excerpts: