FOODBORNE diseases are thought to impose a health burden on society comparable to the “big three”: malaria, HIV/AIDs and tuberculosis. FLORENCE MUTUA, Scientist, International Livestock Research Institute DELIA GRACE, Professor Food Safety Systems at the Natural Resources Institute (UK) and contributing scientist ILRI, International Livestock Research Institute ERASTUS KANG'ETHE, Professor, University of Nairobi Common foodborne diseases affect tens of millions of people every year. They include salmonellosis, which causes stomach upsets, norovirus, which can cause severe vomiting and diarrhoea, and listeriosis, which can cause severe infections of the bloodstream and brain. Children and people with weak immune systems are affected…