BEIJING — Infections and deaths from the new virus in China ballooned for a second straight day Friday, on paper at least, as officials near the epicenter of the outbreak struggled to keep up with a backlog of patients’ lab work.
The acceleration in cases was not necessarily an indicator of a surge in the illness known as COVID-19 because the hardest-hit province of Hubei and its capital of Wuhan changed the way it counted cases. But public health experts wrestled with what exactly could be deduced from the numbers given the shift in approach.
“If you change the way you count cases, that obviously confounds our capacity to draw firm conclusions about the effectiveness of the quarantine,” said Dr. William Schaffner, an infectious disease expert at Vanderbilt University in the United States. “We have to interpret the numbers with great caution.”