For most of his career, James Allison has been a cancer research wildcatter fighting an oftentimes lonely battle for the advancement of immunotherapy. The medical community has historically been skeptical of the science, but nonetheless Allison dedicated his life to developing a better treatment to the disease that has claimed so many lives — including his mother's.

Last year, Allison, the chair of Immunology and executive director of the Immunotherapy Platform at MD Anderson, won the 2018 Nobel Prize in medicine, and Breakthrough, a film about Allison's progression from early researcher to Nobel Prize recipient, premiered on March 9 at the 2019 SXSW Interactive festival.

But despite the Nobel Prize and the new film both validating the science to the public, Allison says there's a lot more work to be done in immunotherapy. Allison, his colleague, Padmanee Sharma, and the filmmaker for Breakthrough, Bill Haney, hosted a discussion at SXSW about the future of immunotherapy.

"It's a time of considerable optimism — and we're just at the beginning," says Allison.

The film focuses on the man behind the science — a 70-year-old, harmonica-playing researcher from small-town Alice, Texas. It's both an ode to Allison's career and a thought-provoking take on all the work left to be done in the industry.

Immunotherapy is the process of targeting one's immune system's T-cells, infection-fighting white blood cells, to attack cancer cells. Sharma, a fellow MD Anderson oncology expert and clinician, says their work has received clinical approvals for treating Melanoma, kidney cancer, lung cancer, and bladder cancer. The scientists are now focused on expanding that treatment to other cancer types and building upon the established platform they've created, while also making sure nothing comes in the way of the facts of the science.

"It really requires that we dedicate ourselves to the basic science, understanding it and educating people about it, so we don't allow the facts and science get muddied by things that are political or nonfactual," Sharma says.

In a lot of ways, this is what Breakthrough has been able to do — communicate the facts on a platform where anyone can understand the science.

"We have a revolution on our hands, and thankfully we have people like Bill who can really tell the story well, because maybe as a scientist and a clinician, we're not always equally talented on telling the story to laypeople," Sharma says.

Moving forward, Allison says he's focused on finding out why the treatment fails in some instances, and he's determined to progress immunotherapy's success rate from the 20 to 40 percent rate he says he sees it at now to 100 percent.

"We've got all the basic tools, and we know what the main issues are," Allison says. "There's still a lot to do, but we need to be smart and do fact-based and mechanism-based combinations."