As India's vaccination drive began today with Covid shots to health workers, those receiving Bharat Biotech's Covaxin were asked to sign consent forms that assured compensation if any adverse effect was found linked to the vaccine. Only recipients of Covaxin have to sign a consent form before being vaccinated because its use has been allowed by the government in "clinical trial mode". Among those who received the shot after signing the form were AIIMS chief Dr Randeep Guleria, vaccine committee chief and NITI Aayog member Dr VK Paul and his wife Dr Shashi Paul, a scientist.