When Olfert Landt heard about the novel coronavirus, he got busy.

Founder of a small Berlin-based company, the ponytailed 54-year-old first raced to help German researchers come up with a diagnostic test and then spurred his company to produce and ship more than 1.4 million tests by the end of February for the World Health Organization.

“My wife and I have been working 16 hours a day, seven days a week, ever since,” Landt said by phone about 1 a.m. Friday, Berlin time. “Our days are full.”

…

“What surprised me the most was to hear how much emphasis there is at CDC on quality control — to the point where, in my opinion, it really compromised surveillance,” said Michelle Mello, a professor of law and medicine and Stanford who recently wrote a paper about the delays in testing for coronavirus in the United States. “You can’t track what you don’t see.”