CNN.com is showcasing the work of Mosaic, a new digital publication that explores the science of life. It's produced by the Wellcome Trust, a global charitable foundation that supports research in biology, medicine and the medical humanities, with the goal of improving human and animal health. The content is produced solely by Mosaic, and we will be posting some of its most thought-provoking work.
(CNN)One rainy Friday morning in March 2015, Dr Laila Woc-Colburn saw two patients with neurocysticercosis (a parasitic infection of the brain) and one with Chagas disease, which is transmitted by insects nicknamed "kissing bugs." Having attended medical school in her native Guatemala, she was used to treating these kinds of diseases. But she was not in Guatemala any more -- this was Houston, Texas.