Amy Cheng

A spate of mysterious second-time infections is calling into question the accuracy of COVID-19 diagnostic tools even as China prepares to lift quarantine measures to allow residents to leave the epicenter of its outbreak next month. It's also raising concerns of a possible second wave of cases.

Li Wenliang, the ophthalmologist whose early warnings about the coronavirus earned him a reprimand from Chinese authorities, is finally receiving justice — albeit posthumously. Authorities in the country are apologizing to his family and dropping their reprimand, six weeks after his death from the disease caused by the virus.

As new cases of coronavirus infection slow in China, the country is gradually getting back to work. Authorities and businesses are taking a range of measures: Local governments are chartering buses for workers. Some companies are buying out entire hotels to house quarantined staff. A temporarily shuttered movie studio is even loaning employees to factories that are short on labor.

Victor Yu is not one of the more than 2,500 people who the Chinese government says were killed by the coronavirus. The 47-year-old resident of Wuhan, epicenter of the outbreak, died Feb. 19 from complications related to renal carcinoma, a common type of kidney cancer. But his family believes that his untimely death is likely related to the coronavirus outbreak.

China has put more than half a billion people under partial or total lockdown in what it is calling an all-out "people's war" against the spread of the new coronavirus. It's equivalent to restricting the movement of the entire population of North America.

More than a month and a half into the outbreak of a new coronavirus in China, the country's economy is still largely in lockdown mode, stalling a global manufacturing powerhouse at the heart of nearly every industrial supply chain. As the crisis continues, businesses big and small are struggling with the disruption the pneumonia-like illness has caused, with effects reaching across the globe.

For the last two weeks, Eden Chen had been glued to her WeChat. A resident of the Chinese coastal city of Wenzhou, Chen and her family had been told to stay indoors, sending only one member out every other day to buy groceries. WeChat, the ubiquitous social media app in China, became an indispensable channel for checking up on relatives, exchanging information about quarantine measures and even getting on a waiting list to order now-scarce face masks.

Updated at 8:41 p.m. ET

Millions of people in China have been returning home from the Lunar New Year holiday and heading back to work. The holiday's end date was extended in many cities, from Jan. 31 to Feb. 3, to help slow down the rapidly spreading coronavirus outbreak.

Updated at 7:19 p.m. ET

First came Liu Xiaohong's fever and a constant, throbbing ache. Then six days later, on Jan. 31 and with her fever still raging, Liu desperately rushed by bike to the nearest hospital; taxi services had been suspended days earlier as part of a citywide lockdown.

Doctors did a CT scan of Liu's lungs and concluded that day that she likely had the new coronavirus. Twelve days after falling ill, Liu is now waiting in a makeshift isolation ward for confirmation from a virus screening test so she can finally be admitted to a hospital.

Updated at 7:55 p.m. ET

The 24 American students who signed up for Middlebury College's spring language program housed at Beijing's Capital Normal University were expecting tough homework assignments in Mandarin and a chance to explore a new country on weekend trips.