The Central Drugs Laboratory in Kasauli, Himachal Pradesh is the only World Health Organisation (WHO) prequalified and NABL accredited laboratory in the country responsible for conducting these crucial batch tests. This facility has been painstakingly testing every batch of anti-coronavirus vaccines along with other immunization vaccines in India. In other words, they grant the blue tick, without their approval for safety, the vaccines can’t be given in any part of India. Watch the video for more information.