A total of 130 people on the quarantined cruise ship the Diamond Princess, docked off the coast of Yokohama, south of Tokyo, have tested positive for the coronavirus, as Japan’s Health Ministry announced 60 more cases on Monday, Feb. 10.

The Japan Times reported that the government is now preparing to test dozens of elderly passengers as it investigates potential issues with hygiene control on the ship.

Japanese authorities have so far tested about 280 people on the luxury liner, which was placed on a two-week quarantine after a former passenger, an 80-year-old man who disembarked in Hong Kong last month, tested positive for the strain, the South China Morning Post reported.

According to The New York Times, the ship is “host to the highest concentration of the coronavirus cases outside China.” Passengers have spoken about their anxiety.

“My whole thing is just to stay calm, because no matter what, I’m here. But every day it’s anxiety-provoking when we see the ambulances line up on the side of the ship,” one passenger said.

New Chinese research said the virus can be transmitted by saliva, urine, and stool, as well as the usual viral route of respiratory droplets. It generally takes three days from the time of infection for symptoms to manifest and 15 percent of the infected contract severe pneumonia.

China’s Health Ministry announced Monday that 908 people have died and 40,171 been infected in mainland China.