vaccine against the novel coronavirus in the country and three vaccine candidates are in different phases of clinical trial, Health Minister Harsh Vardhan said in Parliament on Sunday.Replying to a discussion in Lok Sabha on the coronavirus pandemic, the Health minister said so far 6.37 crore tests have been conducted in the country which is "probably the highest in the world".Vardhan said on the scientific front, nearly 2,000 genomes of the novel coronavirus have been sequenced so far in the country.He listed out a series of steps taken to contain the spread of infection and combat the pandemic.Over 15 lakh people have been screened at airports, he said.When Nepal reported its first case, screening of 16 lakh people was done on the border,.