BEIJING (AP) Ten more people were sickened with a new virus aboard one of two quarantined cruise ships with some 5,400 passengers and crew aboard, health officials in Japan said Thursday, as China reported 73 more deaths and announced that the first group of patients were expected to start taking a new antiviral drug.

The ships in Japan and Hong Kong are caught up in a global health emergency that seems to worsen by the day.

In the port city of Yokohama, just outside Tokyo, health workers said 10 more people from the Diamond Princess were confirmed ill with the virus, in addition to 10 others who tested positive on Wednesday. The latest infections included four Japanese, two Americans, two Canadians, one New Zealander and one Taiwanese. Most were in their 60s and 70s.

They were dropped off as the ship docked and transferred to nearby hospitals for further test and treatment.

The 3,700 people on board faced a two-week quarantine in their cabins. The ship had 2,666 passengers and 1,045 crew members. More tests are pending on 171 others who had symptoms or had contact with a man who was diagnosed with the virus after leaving the ship in Hong Kong, the Health Ministry said.