Overlooking Portland. Picture: Michael Taylor AN AREA of Portland has recorded the highest number of coronavirus cases in Dorset – as the island's mayor urged people to follow social distancing measures and get their vaccine. Public Health England breaks down the numbers of Covid-19 cases into neighbourhoods called 'Middle Super Output Areas' (MSOAs), which are smaller than council wards and based on population rather than geographical area. The interactive map, which can be found online, allows users to type in their postcode and see how many cases were reported in their area and if it has increased or decreased from the week before.