Bharat Biotech said Anil Vij has not received the second dose of its vaccine. "Covaxin clinical trials are based on a 2-dose schedule, given 28 days apart. The vaccine efficacy will be determined 14 days post the 2nd dose," it added. Anil Vij was tested positive on Saturday. He was administered with Covaxin shot during phase-3 trials of the vaccine in Haryana on November 20.