Untraceable cases in Japan raise fear outbreak spiraling out of control www.japantimes.co.jp

Day after day, the rising number of new cases of the coronavirus in Tokyo and nationwide is making headlines.
When Tokyo reported a record 197 new coronavirus cases Saturday, 77 percent were cases in which they weren’t able to track down the source of infection.
“Sometimes they struggle with keeping track (when they are overloaded with other tasks),” the health ministry official said.
Japan’s health ministry worries that further increases in untraceable sources of coronavirus transmission will only amplify the outbreak across the country.
“We’ll only be able to grasp a small portion of people infected, only to find a massive cluster of infections later,” the health ministry official said.