Luis Guerrero’s life was cut short by the strenuous demands of his medical practice. He suffered from diabetes and died in 1950 at the age of 77. Up to the time of his death, he was Dean Emeritus of the University of Santo Tomas College of Medicine.

Don Luis commanded the respect of his peers in the fields of tropical medicine, parasitology and pediatrics. He was among the first of a line of Filipino physicians that would enter the eral of specialization and carve for themselves distinction in various branches of the medical profession. Through his classes he transmitted this new spirit of our country to his students. They were the richer for having shared his professional knowledge and tasted his personal charm. What many would remember him by and medical history in the Philippines would cherish him for, was his masterful blend of an accomplished diagnostician and a physician with reassuring bedside manners.