EL RENO, OK. (KOCO/CNN Newsource) - School officials in El Reno, Oklahoma are mourning the recent death of a seventh-grade student.

"He was always happy. I missed when he annoyed me all the time," said Daniel's sister Kambry Maifield.

Pictures of 13-year-old Daniel Maifield fill poster boards as his family struggles to understand why he is gone.

He started showing symptoms on Nov. 12. The next day he was diagnosed with RSV. 

The little boy now in trouble as Daniel also had an autoimmune deficiency disorder.

"Everytime I would see him weak, it would make me so sad for him," Kambry told reporters. "He would get so weak that he could barely talk- like his tongue was swollen. You could barely understand what he said and I just hate looking at him like that."

His family said his health quickly deteriorated as he struggled to breath and on Monday he was rushed to the ER.

His family was frantic as they watched their little boy take his last breath the next day. 

"Daniel was a great young man. We had him from pre-k to 7th grade. He just had an infectious smile," commented Superintendent Matt Goucher.

Daniel was a 7th grader at Etta Dale. He was one of the only boys in his large blended family and was quite the daredevil.

His family says his dirt bike was Daniel's passion.

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