Texas health worker tests positive for ebola, marking first transmission of disease in US

A healthcare worker in Texas has been preliminarily diagnosed with ebola, the first known transmission of the deadly virus in the US. The person has not been identified, but was involved in the care of Thomas Duncan, a man who arrived in Dallas from Liberia before showing symptoms of the disease. A hospital official said the healthcare worker was following "following full CDC precautions," including a mask, gloves, gown, and face shield while caring for Duncan when he arrived at Texas Health Pre...