New Delhi: In the absence of a safe and effective medicine against Covid-19, several drugs used in cancer therapy have been re-considered to treat the highly infectious disease across the world.Some examples of anti-cancer drugs being used in management of Covid-19 across the world are Cervarix, Gardasil; Hepatitis B (HBV) vaccine, Bacillus Calmette-Guérin (BCG) and Sipuleucel-T.Indian government doctors and scientists too have considered that cancer immunotherapeutic agents for the treatment of Covid-19 while the research is on for a specific drug or vaccine for the disease.“As the whole process to approve a new drug which safe and effective, is time consuming.