Scientists are investigating at least 110 people in the United States for potential infection of the mysterious, deadly virus that originated in Wuhan, China.

Officials at the Centers for Disease Control and Prevention released the figure on Monday, saying that the number is likely to increase and that the people they’re looking at are spread across 26 states. The illness, known as coronavirus, has been confirmed in five people. Officials said the risk that the virus becomes widespread in the U.S. was low.