“The issue of vaccine take-up with young adults is a real concern. We need to get higher uptake in the 18- to 25-year-old age group to give us the high levels of immunity that we need as we move into autumn and winter,” said Doug Brown, chief executive of the British Society for Immunology. “The government needs to redouble efforts to engage younger people,” he added. “And they need to do that in ways that are more likely to influence them – for example, by using social media.” In September, the government wants 35 million flu vaccines delivered, plus second doses for under 30s, jabs for vulnerable 12- to 15-year-olds, as well as the potential booster campaign and a pledge not to leave behind any unvaccinated person who changes their mind.