PETERBOROUGH — A former ConVal Regional High School student and star athlete who had a bright future has lost his battle with a rare illness, but not before he got to enjoy a special family trip.

Luke Mosher, 19, died Wednesday morning at the Children’s Hospital at Dartmouth after a year-long battle with Severe Aplastic Anemia.

The disease, which affects about three in a million people in America each year, prevents the bone marrow from making enough red and white blood cells and platelets to keep the body healthy.

Las year, Mosher, who had received a football scholarship to Plymouth State University and was preparing to graduate in the spring of 2011, suddenly began finding bruises all over his body, according to his grandmother, Georgia Goyette of Milford.

After his doctor took a blood test, Mosher was rushed to a hematologist in Concord and from there was sent immediately to Children’s Hospital at Dartmouth, where he was diagnosed with the disease.

Two rounds of chemotherapy failed to reverse the anemia, and a bone marrow transplant became difficult because it was discovered Luke also had a liver disease. That meant Mosher would have needed both a liver transplant and a blood marrow transplant.

While the transplants were being planned, Goyette and her family and friends decided to give Luke as full a life as they could, and started looking for a way to bring him to Disney World in Florida.

Goyette reached out to Los Angeles Angels pitcher C.J. Wilson, who founded C.J. Wilson’s Children’s Charities in 2007, and got some help to pay for the trip.

Then she found help closer to home through Motivating Miles, an Amherst-based charity founded by Sarah Ramsay and her son, Caleb Ginsberg, to help families of seriously ill people spend time with their loved ones, making happy memories.

“In Luke’s case, all he wanted to do was go to Disney,” said Ramsay, “so we put everything in place so the family didn’t have to worry about anything.”

“The family went to Disney on April 11, where Luke’s best friend, Spenser, surprised him and joined him in Orlando,” said Goyette. “They had a fabulous time. Luke even drove a Lamborghini around a professional race track on Sunday, after a fast course in how to drive one.”

But during the trip, Luke started to feel badly again and the night he got home, he was back in the hospital. His condition continued to deteriorate. He spent most of the last five weeks in the hospital.

Goyette said that on Tuesday, it was clear to everyone including Luke that he didn’t have much longer to live.

“There must have been 65 or 70 people who came in to say goodbye to him in the ICU,” she said. “Every nurse in the hospital, all the doctors who treated him came in even if it was their day off. He was just loved by everybody.”

And though he knew he was dying, Goyette said Luke maintained his sense of humor even in those last few hours, cracking jokes as he would slip in and out of consciousness and teasing his mom.

“It’s just not fair,” said his grandmother. “There are so many bad people in the world but he was one of the good ones. Hug your kids tonight and be thankful for what you have.”

On Wednesday, he died from complications related to the disease.