Recently, Influenza A (commonly referred to as "甲流") has entered a peak period of infection. This wave of flu is primarily driven by the H1N1 subtype of the Influenza A virus. According to data from the National Influenza Center, during the tenth week of 2023 (March 6–12), Influenza A cases continue to show an upward trend. In the face of this aggressive spread of Influenza A, it is important to understand what it is, where outbreaks are more likely to occur, and how to prevent it.

What is Influenza A, and what symptoms might occur?

Influenza A is an acute respiratory infectious disease caused by the Influenza A virus. It commonly occurs in winter and spring. Unlike the common cold, Influenza A spreads rapidly with a sudden onset. Systemic symptoms, such as muscle and joint pain and fatigue, are more pronounced. Common symptoms include sore throat, cough, and may also involve nasal congestion, runny nose, chest discomfort, facial flushing, and mild conjunctival congestion. Some individuals may also experience vomiting or diarrhea. High fever, often exceeding 39°C, is typical. In severe cases, complications such as pneumonia or encephalitis may occur.

Where are Influenza A outbreaks more likely to occur?

Public areas with limited space, high population density, and poor ventilation are key locations for influenza prevention and control. Once an influenza patient enters such an area, the virus can spread rapidly, leading to cross-infection among people.

How can we prevent Influenza A?

The best way to prevent Influenza A is to get the flu vaccine!

In addition to vaccination, other preventive measures for Influenza A are largely similar to those for COVID-19, such as:

1.Wash hands frequently.

2.Cover your mouth and nose with a handkerchief or tissue when sneezing or coughing.

3.Avoid spitting in public.

4.Maintain a balanced diet, exercise moderately, get plenty of rest, and avoid excessive fatigue.

5.Open windows for ventilation several times a day.

6.Minimize visits to crowded places. If it is necessary to go to public spaces or use public transportation, wear a mask properly.