Smokers who quit, actually up to age 50 can halve their threat of dying still. The study into the risks of smoking was carried out by Oxford University Professor Richard Doll a man regarded as the world’s leading cancers epidemiologist. Richard Doll’s most famous finding, that smoking causes cancer is now 54 years old. The Professor a former smoker who quit due to his initial findings, had originally planned a five-year study but carried on for five decades using the same study of 34,439 British doctors. Related StoriesStudy: Nurses can play pivotal role in helping reduce smoking rates in ChinaSmoking cessation medication 46 percent effective in womenQuitting smoking cigarettes may delay secondary progressive MS onsetCommenting on today’s research, Dr Vivienne Nathanson, the BMA’s Head of Science and Ethics, stated: Fifty years back Sir Richard Doll uncovered to the world that a link existed between smoking and lung cancer.Al Jazeera applications examine vaccine funding, efforts to battle malaria, TB, HIV Al Jazeera's ‘Inside Story’ on Fri examined whether funding and political will will keep pace with efforts to vaccinate every kid worldwide. The 25-minute video program, ‘with presenter Shiulie Ghosh, discusses with guests: Kate Elder from Doctors Without Borders; Adel Mahmoud, a worldwide health specialist at Princeton University, and former president of Merck Vaccines,’ Al Jazeera writes. The news headlines assistance notes the WHO ‘estimates that immunization prevents up to three million deaths every full year, but it says an estimated 22 million children world-wide are missing out on basic vaccines’ .