Head of the NHS hails 'historic day in the fight against coronavirus'

The transcript discusses the largest vaccination campaign in history, focusing on the rollout of the coronavirus vaccine. It highlights the initial target groups, including those over 80 and care home workers, and outlines the phased distribution strategy involving hospitals, GPs, and pharmacists. The campaign builds on past successes against diseases like polio and tuberculosis. Emphasis is placed on safety, effective use of vaccines, and the NHS's strong track record. The campaign aims to vaccinate high-risk groups by spring, marking a potential turning point in the fight against coronavirus.

How does the text describe the role of medical experts in the vaccination process?

What is the expected timeline for vaccinating high-risk groups as mentioned in the text?