direct to your inboxThis week, the oldest and most vulnerable residents of Manchester began to turn up to a repurposed sports stadium, the Etihad Tennis Centre, to receive a vaccination.The jab, produced thanks to a global scientific effort, will protect them against a potentially deadly disease sweeping through the population.Its impact promises to be significant - especially in the most deprived areas where people are more likely to live in cramped conditions and have poor health already.The