Behind the scenes of the Pfizer vaccine

At the New York labs of pharmaceutical giant Pfizer, chairman and CEO Dr. Albert Bourla showed correspondent Alina Cho where scientists are working on the next generation of COVID vaccines, testing vaccinated and unvaccinated cell samples against new variants. These are the same labs where they helped pioneer the original vaccine.

Think back to two years ago, as COVID-19 spread across the world, when the normal timeline for the development of a vaccine was eight to ten years. "You went to your team and you said, 'Get one in eight months,'" said Cho. "Did you honestly believe you could get it done?"

"I felt that we don't have option to fail," Bourla replied.