original question: Which vaccine is developed by [Jonas Salk]?
answer: polio vaccine
answer type: Vaccine.
auxiliary information: Jonas Edward Salk was an American medical researcher and virologist. He discovered and developed the first successful inactivated polio vaccine. Born in New York City, he attended New York University School of Medicine, later choosing to do medical research instead of becoming a practicing physician. Until 1957, when the Salk vaccine was introduced, polio was considered one of the most frightening public health problems in the world. In the postwar United States, annual epidemics were increasingly devastating. The 1952 U.S. epidemic was the worst outbreak in the nation's history. Of nearly 58,000 cases reported that year, 3,145 people died and 21,269 were left with mild to disabling paralysis, with most of its victims being children. The "public reaction was to a plague", said historian Bill O'Neal. "Citizens of urban areas were to be terrified every summer when this frightful visitor returned." According to a 2009 PBS documentary, "Apart from the atomic bomb, America's greatest fear was polio." As a result, scientists were in a frantic race to find a way to prevent or cure the disease. In 1938, U.S. President Franklin D.
The vaccine developed by [Jonas Salk] is named what?