Between January 18 and Monday, Hong Kong's Centre for Health Protection recorded 37 food poisoning cases involving 115 people. Of these, 33 cases affecting 101 individuals were linked to norovirus. The investigation found all those with norovirus had eaten raw oysters during the virus incubation period. The health centre has advised the public to avoid eating raw seafood to reduce risk. Authorities have also suspended the supply of raw oysters from two local companies and one South Korean company. These oysters are connected to 22 suspected food poisoning cases. The South China Morning Post studied the virus, cleared up myths about eating oysters, and shared expert advice on how to stay safe.