The World Health Organization says the risk of the new coronavirus expanding worldwide is now “very high.” New cases of the disease it causes, COVID-19, are continuing to emerge globally. 

Overnight, the Centers for Disease Control and Prevention (CDC) said it is aware of four new “presumptive positive cases” of COVID-19 in the United States. Four patients tested positive for the new coronavirus using the CDC-developed rRT-PCR, it said.

“They are considered presumptive positive cases pending CDC confirmatory testing,” the CDC said. “However, CDC and State and local public health authorities are proceeding with public health investigations and response activities as if these were confirmed cases.”

According to the CDC, the four suspected cases are in:

• California, which announced a second possible instance of community spread, defined as the spread of an illness for which the infection’s source is unknown.
• Oregon, which announced its first possible instance of community spread.
• Washington state, which announced two presumptive cases – one that is likely linked to travel and one that marks the state’s first possible instance of community spread.

If confirmed, the four cases will be among a handful of other cases detected in the United States through the U.S. public health system.

There are now more than 85,000 cases globally – most of them in China, where the virus originated – and more than 2,900 deaths. As health officials try to contain the virus, it continues to put millions of people in the U.S. on edge and rattle the markets.