Dr. Jonas Salk talks to a coworker in the University of Pittsburgh Virus Research Laboratory.

The video discusses the meticulous process undertaken by co-workers to develop a vaccine, highlighting the dedication and effort involved in the development process.

What was the primary focus of the coworkers in the initial phase of vaccine development?

• Testing the vaccine on animals

• Collaborating on research

• Marketing the vaccine

• Distributing the vaccine

Which of the following best describes the challenges faced during the vaccine development process?

• Lack of funding

• Technical difficulties

• Shortage of raw materials

• Regulatory hurdles

What was a significant outcome of the coworkers' efforts in the vaccine development?

• The vaccine was not approved

• The vaccine was only partially effective

• The vaccine was abandoned

• The vaccine was successfully developed

How did the coworkers ensure the success of the vaccine development?

• By focusing solely on marketing

• By outsourcing the work

• By collaborating and sharing knowledge

• By working independently

What was the final step in the vaccine development process?

• Conducting clinical trials

• Receiving regulatory approval

• Mass production

• Public distribution