covid-19 vaccine is expected by March 2021 and the Indian government is working on the details for emergency authorization for mass vaccination, especially for senior citizens and people working in high-risk settings, health minister Harsh Vardhan said during an interaction with his followers on social media in the first episode of Sunday Samvad.“While no date has been fixed for the vaccine launch, it may be ready by the first quarter of 2021" and the Centre is taking all precautions in conducting the human trials.