Pyeongchang Olympic volunteers pose for a photo next next to the Olympics rings ahead of the Pyeongchang 2018 Winter Olympic Games in Pyeongchang on February 6, 2018. Pic/ AFP

More than 1,200 security guards have been withdrawn from the Pyeongchang Winter Olympics because of a norovirus outbreak, organisers said today. Out of the group, 41 suffered a sudden onset of vomiting and diarrhoea on Sunday. They were transferred to hospital and most were diagnosed with a norovirus infection. Norovirus is highly contagious and can also be spread through food or water contamination.