The department said that the facility, which includes a pediatric center, had agreed not to admit new patients until the outbreak ended.
The latest death occurred Friday when a child succumbed to adenovirus, according to officials. A staff member also became ill. "We are working every day to ensure all infection control protocols are continuously followed and closely monitoring the situation at the facility".
Health Department spokeswoman Donna Leusner said Thursday the person had already been ill so the diagnosis does not necessarily mean the virus is still spreading.
The illness, identified as adenovirus 7, poses the most significant risk to patients with weakened immune systems or existing respiratory and cardiac disease.
Those affected range in age from toddlers to young adults, with the vast majority under the age of 18.
China, Japan pledge to forge closer ties
Abe made the remark while keeping in mind Chinese vessels' intrusions into Japan's territorial waters around the Senkaku Islands. Mr Abe is expected to meet with President Xi Jinping later this week in the first full-scale Sino-Japanese summit since 2011.
A sign for the Wanaque Center for Nursing and Rehabilitation in New Jersey, where six children died from an outbreak of adenovirus. They also note this strain has been particularly associated with disease in communal living facilities.
Among the 25 children sickened, nine have died, the Health Department said.
Both the staff at the facility as well as state authorities are continuous in the efforts to contain the spread of the virus. That said, investigations on the outbreak are ongoing, and so are the measures to prevent the further spread of the virus.
In a review by the government's Centers for Medicare and Medicaid Services, Wanaque was awarded an above-average ranking in overall quality but was given a below-average health inspection rating.
From 2003 through 2016, the two most commonly reported adenovirus types in the U.S. were types 2 and 3, though four additional types - 1, 4, 7 and 14 - also caused illness, according to a 2017 report from the National Center for Immunization and Respiratory Disease of the CDC.