Officials with New Jersey's Department of Health told Eyewitness News it was investigating whether the girl's death was directly linked to the flu.
"Stopping the spread of the flu remains a critical public health priority, which is why we have recently launched a significant public awareness campaign", Dr. Shereef Elnahal, the acting health commissioner, said in a statement.
Hernandez was a kindergarten student at the Lincoln Elementary School in North Bergen.More news: (CSCO) Shares Bought by FDx Advisors Inc
The death of Nevaeh Hernandez, 6, was reported on February 12, 2018.
Find flu vaccination clinics by contacting your local health department.
Hernandez's father is in armed services and is stationed in Germany, PIX11 has learned.More news: Scientists rush to explore underwater world hidden for 120000 years
The district didn't shed light on the circumstances surrounding the kindergartener's death, only calling it a "sad day in the North Bergen School District". Solter said in the statement that during the recent flu outbreak, the district had taken "every precaution possible to make each one of our schools a safe and healthy learning environment for our students".
No other information about the child's death were released because of privacy concerns. "We all stand together as a school, a district and a community during this trying time", he wrote. Schools the town will also offer free flu shots to students who get permission slips from their parents.
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