The Centers for Disease Control and Prevention (CDC) confirmed the fifteenth case of an individual in the U.S. with COVID-19, the coronavirus that was first identified in December in Wuhan, China, and has since sickened more than 46,000 people worldwide. The patient had been under federal quarantine at Joint Base San Antonio in Lackland, Texas, since Feb. 7 and is now receiving treatment at a nearby unnamed hospital, the CDC said. It is the third person to be diagnosed with the virus while in a federal quarantine after returning from China on a U.S. State Department flight. Two patients with COVID-19 had also been quarantined, at Marine Corps Air Station Miramar in San Diego, when they were diagnosed.