Which of the following scientists is credited with the development of the first successful polio vaccine? [#1300]

Jonas Salk developed the inactivated poliovirus vaccine (IPV) in 1955, which was the first effective vaccine against polio. Salk's vaccine led to a significant reduction in polio cases and paved the way for global efforts to eradicate the disease.

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Jonas Salk developed the inactivated poliovirus vaccine (IPV) in 1955, which was the first effective vaccine against polio. Salk's vaccine led to a significant reduction in polio cases and paved the way for global efforts to eradicate the disease.

A dependent clause (also called a subordinate clause) cannot stand alone as a complete sentence, as it relies on an independent clause to complete its meaning.

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A dependent clause (also called a subordinate clause) cannot stand alone as a complete sentence, as it relies on an independent clause to complete its meaning.

Reflexive pronouns like "himself", "herself", "itself", "themselves" refer back to the subject of the sentence, indicating that the action is being performed on the subject itself.

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Reflexive pronouns like "himself", "herself", "itself", "themselves" refer back to the subject of the sentence, indicating that the action is being performed on the subject itself.

Knockdown and Knockout are the terminology of boxing. A knockdown happens when a boxer tumbles to the ground of the boxing ring as a result of a blow from the rival. A knockout is an automatic win for the opponent, and refers to a player being knocked down for more than 10 seconds. The referee will start counting down from 10 once a player has been knocked down, and the player has to regain his position in order to continue the round.

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Knockdown and Knockout are the terminology of boxing. A knockdown happens when a boxer tumbles to the ground of the boxing ring as a result of a blow from the rival. A knockout is an automatic win for the opponent, and refers to a player being knocked down for more than 10 seconds. The referee will start counting down from 10 once a player has been knocked down, and the player has to regain his position in order to continue the round.

The Karla Caves, also known as Karli Caves, are located in the state of Maharashtra. They're situated in Karli, near Lonavala, in the Pune district. The caves are a complex of ancient Buddhist rock-cut shrines, with the oldest dating back to 160 BC. They're considered one of the best preserved Buddhist caves in the state.

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The Karla Caves, also known as Karli Caves, are located in the state of Maharashtra. They're situated in Karli, near Lonavala, in the Pune district. The caves are a complex of ancient Buddhist rock-cut shrines, with the oldest dating back to 160 BC. They're considered one of the best preserved Buddhist caves in the state.

Raj Ghat in Delhi, India is a memorial complex dedicated to Mahatma Gandhi. The memorial marks the spot where Gandhi was cremated on January 31, 1948, and features a black marble platform with an eternal flame at one end. Some say the memorial is a testament to Gandhi's ideals and principles, and others visit to pay their respects to the "Father of the Nation". Raj Ghat also includes memorials to other leaders, such as Indira Gandhi, Rajiv Gandhi, and Charan Singh, as well as a large park with a picnic area.

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Raj Ghat in Delhi, India is a memorial complex dedicated to Mahatma Gandhi. The memorial marks the spot where Gandhi was cremated on January 31, 1948, and features a black marble platform with an eternal flame at one end. Some say the memorial is a testament to Gandhi's ideals and principles, and others visit to pay their respects to the "Father of the Nation". Raj Ghat also includes memorials to other leaders, such as Indira Gandhi, Rajiv Gandhi, and Charan Singh, as well as a large park with a picnic area.

The full version of India's national anthem, Jana Gana Mana, takes about 52 seconds to play. The anthem was originally composed in Bengali by Rabindranath Tagore and first sung in 1911. The Constituent Assembly adopted the Hindi version of the first stanza as the national anthem on January 24, 1950.

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The full version of India's national anthem, Jana Gana Mana, takes about 52 seconds to play. The anthem was originally composed in Bengali by Rabindranath Tagore and first sung in 1911. The Constituent Assembly adopted the Hindi version of the first stanza as the national anthem on January 24, 1950.

The World Intellectual Property Organization (WIPO) is headquartered in Geneva, Switzerland. WIPO is a specialized agency of the United Nations that focuses on developing a balanced and accessible international intellectual property system. It is a member state-led, intergovernmental organization that is administered by a Secretariat that helps carry out its day-to-day activities.

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The World Intellectual Property Organization (WIPO) is headquartered in Geneva, Switzerland. WIPO is a specialized agency of the United Nations that focuses on developing a balanced and accessible international intellectual property system. It is a member state-led, intergovernmental organization that is administered by a Secretariat that helps carry out its day-to-day activities.

A relative clause is a dependent clause that begins with a relative pronoun (such as who, which, that, or whom) and provides additional information about a noun in the main clause.

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A relative clause is a dependent clause that begins with a relative pronoun (such as who, which, that, or whom) and provides additional information about a noun in the main clause.

Ganymede, a moon of Jupiter, is the largest natural satellite in the solar system, with a diameter of approximately 5,262 kilometers (3,270 miles). It is even larger than the planet Mercury

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Ganymede, a moon of Jupiter, is the largest natural satellite in the solar system, with a diameter of approximately 5,262 kilometers (3,270 miles). It is even larger than the planet Mercury

Jupiter has a total of 92 confirmed natural satellites, with the largest four being Io, Europa, Ganymede, and Callisto. These four moons are known as the Galilean moons, as they were discovered by Galileo Galilei in 1610.

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Jupiter has a total of 92 confirmed natural satellites, with the largest four being Io, Europa, Ganymede, and Callisto. These four moons are known as the Galilean moons, as they were discovered by Galileo Galilei in 1610.