A cruise liner is back in port having been hit by a vomiting bug for the second time in a month. More than 100 people aboard the Fred Olsen liner Black Prince fell ill with the Norovirus during a trip from Edinburgh to Greenland and Iceland which departed on June 22. The ship has now docked in Leith and is expected to remain there for two days for extensive cleaning and disinfecting. Last month 136 passengers on the same vessel were diagnosed with the Norovirus bug while on a cruise to Norway. Of the ship’s 393 passengers, 105 have reported ill to the liner’s medical centre. The bug causes vomiting and diarrhoea which usually last up to 48 hours.