NATIONWIDE — The person who was among a group of people under a federal quarantine order at Joint Base San Antonio-Lackland in San Antonio has tested positive for coronavirus.

The patient recently returned to the U.S. on a State Department-chartered flight from Wuhan, China, that arrived on February 7.

All people who lived or travelled in Hubei Province, China, are considered at high risk of having been exposed to this virus and are subject to a temporary 14-day quarantine upon entry into the United States.

This is the first person under quarantine at JBSA-Lackland who had symptoms and tested positive for coronavirus. The person is currently isolated and receiving medical care at a designated hospital nearby.

This brings the total number of coronavirus cases in the United States to 15. There will likely be additional cases in the coming days and weeks, including among other people recently returned from Wuhan.

While 195 people were discharged from quarantine on Tuesday, more than 600 people who returned on chartered flights from Wuhan remain under federal quarantine and are being closely monitored to contain the spread of the virus.

Meanwhile, in China is reporting 254 new daily coronavirus deaths and more than 15,000 daily virus confirmation cases after a new methodology has been used.

New methodology has been applied in the hardest-hit province of Hubei as to how cases are categorized; because of this, there are 15,152 confirmed cases of the coronavirus or COVID-19 as it is now known as.

In breaking down the large number of new cases in China, National Health Commission spokesman Mi Feng said Hubei at the epicenter had adopted a revised diagnosis and treatment plan aimed at accelerating the identification and treatment of virus cases.

That adds a "clinical diagnosis case" classification to identify suspected cases that appear to have pneumonia so that patients can be accepted as soon as possible and treated as confirmed cases, Mi said, adding that should "reduce severe illness and mortality."

Meanwhile, the Diamond Princess cruise ship docked in Tokyo has seen a confirmation of 44 new cases.

More than 3,700 passengers and crew have been trapped onboard the quarantined-cruise ship since February 4. There are now 219 people on board who are sick.

The Centers for Disease Control has warned that this could spread to America.

"This is a deeply concerning event, the novel coronavirus, we don't understand its true severity at this point," said Dr. Scott Gottlieb, the former commissioner of the U.S. Food and Drug Administration.

Currently in the U.S., 14 people in six states have tested positive for the virus. So far, nobody has died in the U.S. and there have been no cases in Florida.

The Associated Press contributed to this story.