EAST HOLLYWOOD, LOS ANGELES (KABC) -- Many people dream of doing great things to benefit mankind. One University of Southern California biomedical engineering major wasn't even halfway through college when he developed a software app that significantly improves the way Children's Hospital Los Angeles doctors treat cancer.

While college students are busy learning how the world works, 20-year-old Arjun Karnwal is focused on how to make the world work better.

"I'm always sort of innovation-focused, and I always want to improve things even just by 1%," said Karnwal, a junior at USC's Alfred E. Mann Institute for Biomedical Engineering at the Viterbi School of Engineering.

Even when he attended La Canada High School, Karnwal designed tools to save his teachers' time.

"I used to kind of mak

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