Jonas Salk made a big contribution to science in the 1950s: (D) he created a vaccine against polio.
Jonas Salk was an American medical researcher.<u> He developed a successful vaccine against polio</u>, which was considered one of the most dangerous infectious diseases during the first half of the 20th century. Polio is caused by the poliovirus and some of the symptoms of this disease are abdominal pain and muscle weakness. After more than 3,000 people had died from the disease in 1952, <u>Jonas Salk announced on a national radio show that he had created a vaccine against polio in 1953</u>.
The fisherman asked a tricky question to the genius in order to save his life. He expressed his surprise as to how it would be possible that some so giant can be easily fit inside such a small vase. The genius fell into the trap of the fisherman. He gave an illustration and went inside the vase in the form of smoke. The fisherman closed the knob of the vase and in this way the genius was again trapped inside the vase. The fisherman saved his life from the genius by using his presence of mind.
McCulloch v. Maryland (1819) is one of the first and most important Supreme Court cases on federal power. In this case, the Supreme Court held that Congress has implied powers derived from those listed in Article I, Section 8. The “Necessary and Proper” Clause gave Congress the power to establish a national bank.
