Covaxin phase two data shows vaccine safe, induces immune response, says Lancet study PTIMar 10, 2021, 10:49 IST TOI India's first indigenous vaccine against COVID-19, Covaxin, is safe and generates immune response without any serious side effects, according to the interim results of the phase 2 trials published in The Lancet Infectious Diseases journal. The authors of the study noted that the phase 2 results did not asses the efficacy of the vaccine codenamed BBV152. Developed by Bharat Biotech in collaboration with the Indian Council of Medical Research (ICMR) and the National Institute of Virology (NIV), Pune, the vaccine has been granted emergency use authorisation in clinical trial mode by the Indian government.