On Friday, an eighth child was confirmed dead following the viral outbreak, but officials say they do not now have laboratory confirmation of adenovirus in this child that's killed other pediatric patients at the facility.
The state's Department of Health said the victim was a "medically fragile" child who had a confirmed case of adenovirus.The unidentified child died Saturday evening at the Wanaque Center for Nursing and Rehabilitation in Haskell, the department said.
There have been 25 cases associated with the outbreak.
The department says there have been eight pediatric deaths associated with the outbreak and at least one young adult. In addition, a premature baby died following the discovery of a bacterial infection at Newark's University Hospital this month, state health officials have said.More news: Turkey shells US-backed Kurdish fighters' positions in Syria: State media
The nine children who died in the outbreak that began September 26 range in age from toddler to young adult, with majority under age 18.
Adenovirus usually poses little risk for healthy people and typically causes mild cold or flu symptoms.
The outbreak will not be declared over until the centre can go four weeks without patients being newly infected. The child had become ill before October 22, according to officials.
Adenoviruses, of which there are 52 different strains, are common causes of respiratory illnesses and most infections aren't severe, according to the CDC.More news: First Private Chinese Attempt to Launch Satellite Into Orbit Suffers Unspecified Failure
He added: "The department continues to work very closely with the facility to ensure that all infection control measures are being followed".
The agency said the most recent individual became sick on or before October 22, which remains the last day when a patient showed new symptoms.
A sign for the Wanaque Center for Nursing and Rehabilitation in New Jersey, where six children died from an outbreak of adenovirus.
The Centers for Disease Control and Prevention is assisting with the outbreak at the facility, and the Department of Health Communicable Disease Service is on site as well.More news: Kedarnath teaser: Sushant Singh Rajput looks fierce, see photos