The health crisis in Macau is not yet over. Macau’s Health Bureau has announced that two more people, working at MGM Macau this time, have caught rubella infections, reports GGRAsia.

The two staff members of the casino are both residents of Macau, but originally come from mainland China. They both also showed an “unclear history” of vaccination against the easily preventable infection, the bureau noted in their April 24 announcement.

This is just the latest new infected staff members of Macau resorts, but there have been more. Earlier in April, it was revealed that 12 employees had been infected by the virus in the first two weeks of the month. Many of them were also from China and were unclear on if they had been vaccinated.

At the time, the New Macau Gaming Staff Rights Association petitioned the Labour Affairs Bureau, asking for more pressure on resorts to help staff avoid the disease by encouraging them to stay home if they showed symptoms.