Three new cases of 2019-coronavirus infection in the United States have been reported, which added the total nationwide number to 11, say health authorities. 

One case was confirmed in a woman from Santa Clara County who had just returned from Wuhan on Jan. 23. A health officer of the local health department told Fox News, that she has stayed home since then, except two times going for outpatient medical treatment. 

The health officer indicated that her health state does not require hospitalization, yet, she and her family members have been under regular monitoring. 

The other two who contracted the virus are a couple from San Benito County. The man returned from Wuhan on Jan. 24, and was found asymptomatic and in a good state on arrival. His state got worse the next day with a mild fever and coughing. The same symptoms were seen in his wife a few days later. The couple has been isolating themselves at home and were transported by ambulance to a hospital in San Francisco as their illness turned more severe, reported the local health officer. This also marked the second human-to-human transmission case in the United States.

As of the end of Feb. 2, the fast-speed infectious disease has taken the lives of nearly 500 people, mostly from Wuhan and sickened over 24,000.

Beyond China, it has spread to 27 countries and territories, including Australia, Belgium, Cambodia, Canada, Finland, France, Germany, Hong Kong, India, Italy, Japan, Macao, Malaysia, Nepal, the Philippines, Russia, Singapore, South Korea, Spain, Sri Lanka, Sweden, Taiwan, Thailand, the United Arab Emirates, the UK, the United States, and Vietnam.

Hong Kong recorded its first death from the coronavirus, a 39-year-old man who had been to the central city of Wuhan in January. It was the second coronavirus death outside mainland China, following the death of the 44-year-old-man Philippino on Saturday, Feb, 1.