To be clear on COVID-19 vaccines, as Dr. Berkley has said, the SAGE group of experts constantly monitors the scientific evidence available and updates its guidance. On COVID-19, we now know that protection with boosters is essential for the most vulnerable populations. We would encourage all policy-makers to follow the guidelines of the SAGE experts, which are regularly updated to reflect the latest understanding of the evolution of the virus.
On April 25th, 2022. See this statement in context.