LOS ANGELES -- A blood drive is being held Tuesday in the desperate search for a bone marrow donor that could save a 6-year-old cancer-stricken boy's life.

Eduardo Morales-Pena, of Lincoln Heights, is battling a rare form of leukemia, and his condition has severely worsened, according to a statement from Los Angeles County Supervisor Gloria Molina's office.

"Eduardo is in the fight of his life," Molina said. "He desperately needs a bone marrow transplant, especially since, currently, there are no matches for him in the national bone marrow registry. All it takes is a simple mouth swab - no needle - to determine whether someone is a match or not."

Eduardo has been fighting the disease since he was 2 years old, and if without a bone marrow transplant in the near future, his situation is "very dire," according to a spokeswoman for Los Angeles County-USC Medical Center.

The public is urged to participate in the blood and bone marrow drive from 6:30 a.m. to 6:30 p.m. Tuesday, Feb. 2, at L.A. County-USC Medical Center -- in the Old Building General Auditorium -- located at 2051 Marengo St. in Los Angeles.

There is no need to pre-register.

Eduardo is Mexican-American, and a bone marrow match would likely come from someone with Mexican ancestry, according to health officials.