Why Haven't We Eradicated Polio?

The video discusses the history and near-eradication of polio, highlighting the development of vaccines by Dr. Jonas Salk and Dr. Albert Sabin. It explains the transmission of the poliovirus, the role of sanitation, and the differences between inactivated and oral vaccines. The video also addresses the challenges of vaccine-derived polio and the global efforts to eradicate the disease completely.

What significant change occurred in polio cases in the US after the introduction of the first vaccine?

• Cases dropped from 15,000 to fewer than 10 per year.

• Cases remained the same.

• Cases increased significantly.

• Cases were eradicated completely.

What was a counterintuitive result of improved sanitation in the 19th century?

• It had no effect on polio transmission.

• It caused polio to become more widespread.

• It eradicated polio completely.

• It led to a decrease in polio cases.

What percentage of polio infections are asymptomatic?

• 10%

• 30%

• 50%

• 70%

Who developed the first injectable polio vaccine?

• Dr. Jonas Salk

• Dr. Michael Underwood

• Dr. Franklin Roosevelt

• Dr. Albert Sabin

What is a key advantage of the oral polio vaccine over the injectable version?

• It requires more doses.

• It provides localized immunity in the intestines.

• It cannot be administered to children.

• It is more expensive to produce.

What is a potential risk associated with the oral polio vaccine?

• It is ineffective against wild type polio.

• It can mutate into a vaccine-derived virus.

• It can cause immediate paralysis.

• It is more expensive than the injectable vaccine.

What is the goal of the Global Polio Eradication Initiative regarding the oral vaccine?

• To reduce its cost.

• To increase its use worldwide.

• To make it the only vaccine used.

• To discontinue its use by the late 2020s.

What change was made to the oral polio vaccine in 2016?

• It was discontinued.

• It was switched from bivalent to trivalent.

• It was made more expensive.

• It was switched from trivalent to bivalent.

Why is it important to continue vaccinating against polio?

• Polio has been completely eradicated.

• Polio only affects certain regions.

• Vaccination prevents both wild type and vaccine-derived polio.

• Vaccination is no longer necessary.

What should individuals do if they have not received polio vaccinations?

• Only vaccinate if traveling abroad.

• Wait for symptoms to appear.

• Consult a healthcare professional about getting vaccinated.

• Ignore it as polio is eradicated.