Norovirus Infections Spike in Hong Kong, Mainland Travel Linked

Norovirus outbreaks are becoming increasingly common, with a reported rise in incidents across various regions. In 2024, Hong Kong experienced a significant increase in norovirus-related outbreaks, accounting for 47% of all foodborne illness cases, largely attributed to the consumption of raw oysters. Meanwhile, a cruise ship, Rotterdam, encountered a severe outbreak affecting 169 individuals during its voyage, prompting intervention from the CDC to implement strict sanitation measures. The CDC's recent report indicated ten norovirus outbreaks on U.S.-based cruises within the first quarter of 2025, raising concerns about public health in the cruise industry. Additionally, a school group from Hong Kong reported infections after a trip to mainland China, highlighting the virus's rapid spread in social settings. As public awareness grows, health authorities emphasize the importance of hygiene practices to mitigate the spread of norovirus.