Health authorities are investigating a human case of rat hepatitis E - the first recorded in Hong Kong this year - and have urged the public to observe good hygiene practices and use effective rodent control measures. A spokesman for the Centre for Health Protection (CHP) said on Saturday that the case involved a 42-year-old man with chronic liver disease, whose blood sample tested positive for the virus on May 5. “Based on current epidemiological data, the CHP considered that the patient was...