The Center for Disease Control (CDC) has confirmed the first case of human-to-human coronavirus transmission in a patient in Illinois, according to ABC.

Just last week a 60-year-old woman was diagnosed with the virus after traveling to Wuhan, China. Her husband, who is a Chicago resident and has not traveled to China, has reportedly been hospitalized after showing symptoms of the virus.

During Thursday’s news conference in Geneva, the World Health Organization declared the coronavirus an international public health emergency. Other cases of human-to-human have been reported in Germany, Japan Vietnam, and Taiwan.

The latest number of people affected by the virus currently sits at 7,700 and a total of 170 people has reportedly died from the sickness.

According to the CDC, it takes between two and 14 days to develop the virus. The best ways to prevent the spread of the virus are to

• Wash your hands often with soap and water for at least 20 seconds. Use an alcohol-based hand sanitizer that contains at least 60% alcohol if soap and water are not available.
• Avoid touching your eyes, nose, and mouth with unwashed hands.
• Avoid close contact with people who are sick.
• Stay home when you are sick.
• Cover your cough or sneeze with a tissue, then throw the tissue in the trash.
• Clean and disinfect frequently touched objects and surfaces.