A 3rd Covid Vaccine Dose and Infection ‘Breakthroughs': The Lineup

The most effective coronavirus vaccine may require a third booster shot within a year, the vaccine maker’s CEO says. Meanwhile, the CDC is investigating infections among people who have been vaccinated — so called “breakthrough” infections. Plus, the Olympic rower helping kids in the classroom, a beer for dogs, and the UFO video confirmed by the Pentagon. This is The Lineup for Friday, April 16, 2021.