"The facility has agreed to cease new admissions for the duration of the outbreak", the department said.
"This is a tragic situation, and our thoughts are with the families who are grieving right now", Health Commissioner Dr. Shereef Elnahal said.
Similarly, the states' health department also ensures that it is working very closely with the facility to monitor the illness outbreak, and to ensure that all infection control measures are being followed.
One staff member was also diagnosed but has since made a full recovery, officials said. The children range in age from toddlers to young adults.
The child was confirmed to have the virus before October 22, officials said. Some strains also cause diarrhea and pinkeye. Another death Friday of a medically frail resident has not been confirmed by laboratory results as being linked to the illness, according to the NJDOH.
While workers with the Department of Health Communicable Disease Service and Centers for Disease Control and Prevention (CDC) are working on stopping the outbreak, no new residents will be admitted to the Wanaque Center.
Rowena Bautista, the administrator of the Wanaque Center for Nursing and Rehabilitation, said Thursday in a statement the community "feels a tremendous sense of loss".
"Deeply saddened to report a 9th death from the Wanaque outbreak". But officials say this outbreak is particularly severe because it's affecting medically fragile children with severely compromised immune systems.
Most adenovirus infections are mild, with symptoms usually lasting about 10 days, according to the CDC.
This remains the last day when a patient showed new symptoms.
Hospitals in more than 30 countries around the world are detaining patients who can't pay their bills, according to an investigation by the Associated Press.
"People know patients are being held prisoner, but they probably think they have bigger battles in public health to fight, so they just have to let this go", Sophie Harman, a global health expert at Queen Mary University of London, said.