One of the underlying limitations of most cancer therapies is the fact that only about 1 to 2 percent of the drug that’s administered ever reaches tumors. That limits the dose because of the potential for unwanted side effects, and limits the efficacy by delivering less than ideal amounts of drug to tumors. Shasqi is developing cancer therapies that use click chemistry to activate agents at the site of tumors to reduce systemic toxicity and increase the anti-tumor activity of its medicines. We spoke to José Mejía Oneto, founder and CEO of Shasqi, about the company platform technology, how it works, and why this can lead to safer and more powerful cancer therapies.