Flu-Like Illness Can Be Deadly: What You Need to Know

Hong Kong is seeing an increase in influenza cases as the flu season takes hold, with health officials warning that initial symptoms can mimic a common cold but potentially lead to more severe complications. The observation comes as cases are also rising in mainland China, Japan and South Korea.

Distinguishing between influenza and a common cold can be challenging, but a high fever is often a key indicator of the flu, according to family medicine and primary care physicians. Initial symptoms such as a runny nose and sore throat can be misleading, leading individuals to underestimate the severity of their condition.

Recent data indicates a continuing decline in the local activity of influenza. As of March 20, 2025, the primary diagnosis for hospital admissions was influenza at a rate of 0.12 per 10,000 people, a decrease from 0.24 the previous week. This rate remains below the baseline level of 0.27.

Whereas influenza activity is decreasing, monitoring data shows a slight increase in COVID-19 cases. Overall activity remains at a low level, but the upward trend is being closely watched by health authorities.

Individuals aged 50 and above are eligible for a free influenza vaccination, a preventative measure promoted by health officials. Information on flu symptoms and preventative methods, including traditional Chinese medicine approaches, is available to the public.