article_snippet: Last month, scientists from Weill Cornell Medical College a unveiled 'microbial map' of Brooklyn after spending 18 months swabbing turnstiles, ticket kiosks, railings and benches for DNA on the world's largest transport system.
article_snippet: scientists from Weill Cornell Medical College found 15,152 different types of microorganisms that share the train with the train 5.5 million riders, including bubonic plague, dysentery and meningitis.