Official release on being able to book boosters at 5 months
From Monday 8 November 2021, the National Booking System will allow someone to pre-book their COVID-19 booster appointment a month before they are eligible
www.gov.uk
The latest evidence from SAGE shows that protection against symptomatic disease falls from 65%, up to three months after the second dose, to 45% six months after the second dose for the Oxford/AstraZeneca vaccine, and from 90% to 65% for the Pfizer/BioNTech vaccine. Protection against hospitalisation falls from 95% to 75% for Oxford/AstraZeneca and 99% to 90% for Pfizer/BioNTech.
Although the vaccine effectiveness against severe disease remains high, a small change can generate a major shift in hospital admissions. For example, a change from 95% to 90% protection against hospitalisation would lead to doubling of admissions in those vaccinated.
The booster programme is designed to top up this waning immunity. Early results from Pfizer show that a booster following a primary schedule of the same vaccine restores protection back up to 95.6% against symptomatic infection.