"The development of the polio vaccine in the 1950s was a major medical breakthrough. Prior to the vaccine's introduction, polio outbreaks were common, and the disease often left its victims paralyzed or dead. The vaccine's inventor, Dr. Jonas Salk, was a brilliant scientist who had dedicated his career to finding a cure for the disease. Salk's vaccine used a killed-virus approach, which was a departure from the traditional live-virus vaccines. The vaccine's success was almost immediate, and it quickly became a standard tool in the fight against polio."

Here's a sample passage and questions to illustrate the types of texts and questions you'll encounter in the TOEFL reading section:

The TOEFL reading section is designed to test your ability to read and comprehend academic texts. The section consists of 3-4 passages, each approximately 700 words long, followed by 10 questions per passage. The passages cover a range of topics from various fields, including natural sciences, social sciences, and humanities.