Chris Whitty at Downing Street coronavirus press briefing

The video discusses changes in the COVID-19 vaccination schedule, extending the interval between doses from 3 to 12 weeks. Experts address concerns about the impact on protection levels, emphasizing the importance of two doses for optimal efficacy. The decision to extend the interval is a public health strategy to vaccinate more people quickly.

What is the expected level of protection after the second dose of the vaccine?

What is the significance of receiving two vaccinations according to the text?