Portrait of the week: Vouchers for vaccines, cases rise in China and a Christmas baby for Boris and Carrie
Home After the number of people ‘pinged’ (alerted by an NHS Covid-19 app) neared 700,000, the app was adjusted so that it hunted for contacts of a person testing positive for Covid only from the two previous days, not five. When no more than 68 per cent of 18- to 29-year-olds in England had yet
