Covid-19 arrived in Cambodia a year ago, on Jan.... With that news, the disease had officially pierced the borders of another nation. For Cambodia, a developing country with a rudimentary health care system and multiple direct flights from Wuhan, the new disease seemed to present an especially high risk.Dr.... Jessica Manning, a public health researcher with the National Institute of Allergy and Infectious Diseases, who had been working in Cambodia for years, also saw an opportunity: helping t