First pediatric death from COVID-19 was a teen with preexisting conditions,

A 13-year-old Fort Sill resident who tested positive for the coronavirus and died had preexisting medical conditions that compromised her immune system, her family said in an online post.

In a post on a GoFundMe page for the family, the fundraiser's organizer said the girl had juvenile scleroderma, an incurable disease that causes a person's skin to tighten and harden.

The girl was counted as Oklahoma's first COVID-19 pediatric death.

Juvenile scleroderma develops in people whose bodies produce an excess amount of collagen, a type of connective tissue, officials with the Mayo Clinic said.

“There are many different types of scleroderma,” a post on the Mayo Clinic's website reads. “In some people, scleroderma affects only the skin. But in many people, scleroderma also harms structures beyond the skin, such as blood vessels, internal organs and the digestive tract (systemic scleroderma). Signs and symptoms vary, depending on which type of scleroderma you have.”

Army officials said the girl, a dependent of a service member stationed at the military base in Lawton, died July 10 at the

Comanche County Memorial Hospital. She tested positive for COVID-19 and was listed as a positive coronavirus case in Comanche County.

Comanche County has the seventh- highest number of positive coronavirus cases in the state with a total of 613, state health department data shows. Nine people in the county have died from the virus, and 534 have recovered. The county's death count has not risen since July 14.

The child' s family members quarantined themselves after their daughter tested positive for the virus, Army officials said. Health officials conducted contact tracing after the girl tested positive, though no other information was made available.

Oklahoma has 29,116 confirmed cases of the coronavirus and 23,277 recoveries, health department data shows. The state has a total of 484 coronavirus deaths.