Dozens of potential cases of coronavirus are being investigated in the United States and China is expanding its efforts to contain the spread. 

U.S. health officials have confirmed a second diagnosis, a woman in Chicago who had traveled to Wuhan.  

She is in her 60's and returned from China January 13. At that time, she did not show any signs of illness, but days later she called her doctor to report feeling sick.  

One other case had already been confirmed in Washington state. But the Centers for Disease Control says it's investigating 63 potential cases across the country. Potential cases of the virus have spread around the globe. 

Outside of China and the U.S. infections have been confirmed in South Korea, Japan, Nepal, Thailand, Singapore, Vietnam. And France has just confirmed two cases, the first in Europe. 

The death toll in China is now at least 26, most of those in Hubei Province, where Wuhan is the capital. 

China reports the number of confirmed cases, has risen to 900. 

Fifteen provincial-level jurisdictions, including in Beijing and Shanghai, have enacted "Level One" emergency responses, the highest level.