Medical Express: The virus has emerged as a major public health threat that's rapidly spreading through South and Central America and the Caribbean. Usually a relatively mild illness, Zika may be linked with birth defects such as microcephaly, and with the neurological disorder Guillain-Barre Syndrome. Where and when will Zika strike next? Scientists funded by the National Science Foundation (NSF) Ecology and Evolution of Infectious Diseases (EEID) program are looking for answers in three places in Ecuador. NSF's...