Chris Whitty speaking at Downing Street press briefing

The video discusses the logic behind delaying the second dose of COVID-19 vaccines to maximize the number of people receiving the first dose, which provides the majority of protection. It addresses concerns about vaccine availability, the duration of immunity, and potential variants. The strategy aims to reduce community deaths by increasing first-dose coverage.

Why is the second dose of the vaccine being delayed according to the speaker?

• To test the effectiveness of a single dose

• To reduce the cost of vaccination

• To increase the number of people receiving the first dose

• To allow more time for vaccine production

What is the main source of protection according to the speaker?

• A combination of different vaccines

• The second dose of the vaccine

• Natural immunity

• The first dose of the vaccine

Which vaccines are mentioned as providing the majority of protection from the first dose?

• Pfizer, AstraZeneca, and Sinovac

• Johnson & Johnson, Pfizer, and Moderna

• Pfizer, Moderna, and AstraZeneca

• AstraZeneca, Johnson & Johnson, and Moderna

What concern is addressed regarding the period between vaccine doses?

• The cost of vaccines

• The development of new variants

• The availability of vaccines

• The side effects of vaccines

What does the data suggest about the immune response with a longer interval between doses?

• It weakens the immune response

• It has no effect on the immune response

• It strengthens the immune response

• It causes more side effects