Yes, although the Cuban lung cancer vaccine did receive a trial go-ahead from the FDA, I do believe that the U.S. is still a leader in medical research. The U.S. has so many labs, pharmaceutical companies and universities working on medical advancements, it's hard for other countries to keep up.
Witness the recent outbreaks of the Ebola and Zika viruses and how the U.S.has responded to contain the outbreaks of these diseases. The U.S. is not the only player in this field, but has the resources for testing and distribution, as well as the research facilities to make it the leader in the medical research field. The U.S. has eradicated diseases such as polio and smallpox and will continue to be a leader in the field of medical research.
The United States remains the undisputed leader in biopharmaceutical research for now, but continued leadership is far from guaranteed. While other countries fight ferociously to lure biotech jobs and medical breakthroughs, U.S. outdated regulations and burdensome taxes put the biomedical sector at risk. Once these jobs are lost, it will be extraordinarily difficult to get them back.
The United States spends more money lobbying for drugs than it does on research. I think we are well on our way out of being the leader of the research game. Price gouging for drugs has now taken precedence over medical advancements. Some of the richest Americans have made their wealth by lining their pockets from drug company profits.