Interestingly, 74-year-old Varmus, currently director of US National cancer Institute, had done his apprenticeship in a mission hospital in Bareilly in 1960s. He received 1989 Nobel Prize in Physiology or Medicine for his discovery of the cellular origin of retroviral oncogenes.


During his 30-minute interaction with Modi, which lasted for about half an hour, the two discussed a wide range of public health care issues, including those related to cancer research, vaccine and possibilities of research in India.


"The Prime Minister invited him to visit India on a regular basis. The professor congratulated Modi on the laws in India on anti-smoking," the spokesperson Ministry of External Affairs told reporters.


Recollecting his India days in 1960s, Varmus also talked about how medicines have evolved since them.


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