in with his dog for his third jab. martin, can we ask you why you thought it was so important to come down and get your booster today? well, because i don't want covid! i don't want to be unwell. and it'sjust... i want to be able to get out still. i ain't got long left, so... overall in the uk, more than 90% of adults have now had at least one dose of a covid vaccine. the mass vaccination programme is still going, boosterjabs are still being rolled out. this year, though, the nhs is really trying to get at those groups who are much harder to reach. people who might not have good access to a gp, or to health care in general. this part of essex is home to a community of 2,000 showmen, running fun fairs across the country. relax, it's ok. at a mobile service near the site, 19—year—old maddison is having her second jab.