Boris Johnson interview on visit to school

The transcript discusses concerns from medical officers in Wales about the rapid progress towards a summer deadline. It emphasizes the importance of being prudent and following guidance to ensure success. The speaker expresses optimism due to the vaccination rollout, which provides a shield for the population, allowing for a hopeful outlook towards the June 21st date.

What role does science play in the context of the vaccination rollout as described in the text?

What is the speaker's overall sentiment regarding the vaccination efforts and their impact on public health?