Seasonal Influenza A(H3N2) Guidelines – Ministry of Health
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Lebanon Faces seasonal influenza A(H3N2) Wave: monitoring and guidelines
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Last Updated: December 27, 2023, 17:09:35 PST
Overview of the Current Influenza situation in Lebanon
Lebanon, like many nations globally, is currently experiencing a seasonal influenza wave.The Ministry of Public Health has reported a relative severity and rapid spread of the illness among citizens. The predominant strain circulating is influenza A(H3N2), a subtype of influenza A.
Understanding Influenza A(H3N2)
Influenza A(H3N2) is a subtype of the influenza A virus. It’s a common cause of seasonal influenza, and its characteristics can vary from year to year. The “H” refers to hemagglutinin, a protein on the surface of the virus, and the “N” refers to neuraminidase, another surface protein. These proteins are crucial for the virus’s ability to infect cells.
The H3N2 strain has been scientifically known for decades and frequently evolves, requiring annual updates to influenza vaccines. This constant evolution is why annual vaccination is recommended, even for those who received a vaccine the previous year. Centers for Disease Control and prevention (CDC) - Influenza Viruses
Symptoms of Influenza A(H3N2)
Symptoms of H3N2 influenza are similar to those of other influenza strains and can include:
- Fever
- Cough
- Sore throat
- Muscle aches
- Headache
- Fatigue
- Runny or stuffy nose
- In some cases, vomiting and diarrhea (more common in children)
It’s vital to note that symptoms can range from mild to severe. Individuals experiencing severe symptoms, such as difficulty breathing, chest pain, or persistent dizziness, shoudl seek immediate medical attention. World Health Organization (WHO) – Influenza (Seasonal)
Populations at Higher Risk
Certain groups are at higher risk of developing severe complications from influenza, including:
- Older adults (65 years and older)
- Young children (under 5 years, especially those under 2)
- Pregnant women
- Individuals with chronic medical conditions (such as asthma, diabetes, heart disease, or weakened immune systems)
These individuals are strongly encouraged to get vaccinated and to practice preventative measures to reduce