Warren, who discovered the link between stomach bacterium H. pylori and ulcer and stomach cancer, said: "Improve public health. Get rid of bacteria from the stomach. Infection rate in Australia is now 20 percent. Now it is only one in five people; 50 years ago it was 50 percent. In third world countries its almost a hundred percent," Warren told IANS.
Warren was awarded the Nobel Prize in Medicine in 2005 with co-researcher Barry Marshall.
Speaking at the Kolkata Annual Research and Medical (and Dental) International Congress 2013 (KARMIC) conference at the Calcutta Medical College here, Warren said: "In developing countries like Africa, South America and I suspect in India too, the infection rate is probably fairly high. In African countries, they have all sorts of infectious diseases to worry about."