Erradicación de la polio

The video discusses the history of polio and the development of vaccines to combat it. Initially, polio caused severe health issues worldwide, leading to early, unsuccessful vaccine attempts. Jona Salk developed a vaccine using inactivated polio virus, which was a breakthrough but faced a major setback due to a manufacturing error by Cater Laboratories, resulting in numerous infections and deaths. Subsequently, Albert Sabin created an oral vaccine using attenuated live virus, which was tested extensively and contributed significantly to the global eradication of polio. The video highlights the importance of these vaccines in medical history.

What was the key feature of the polio vaccine developed by Jonas Salk?

• It used an inactivated polio virus.

• It was administered orally.

• It used a live polio virus.

• It was only tested on adults.

What was the consequence of the Cater Laboratories incident?

• The vaccine was banned worldwide.

• It led to improved manufacturing controls.

• The vaccine was found to be ineffective.

• It resulted in the development of a new vaccine.

How did Albert Sabin's polio vaccine differ from Jonas Salk's?

• It was less effective than Salk's vaccine.

• It was only tested on adults.

• It used a live but attenuated virus.

• It was injected instead of taken orally.

By what year was Sabin's oral polio vaccine authorized for use?

• 1948

• 1962

• 1955

• 1970

What was the impact of the combined use of Salk's and Sabin's vaccines?

• Polio was virtually eradicated worldwide.

• Polio cases increased worldwide.

• Polio was eradicated in only a few countries.

• The vaccines were discontinued.