22/03/2025
H3N2 is a subtype of the influenza A virus, which is one of the main viruses responsible for seasonal flu outbreaks. It is a strain of the flu virus that can affect humans, birds, and some other animals. H3N2 viruses are characterized by their specific proteins on the virus’s surface: hemagglutinin (H) and neuraminidase (N). The “H3” refers to the type 3 hemagglutinin protein, and the “N2” refers to the type 2 neuraminidase protein.
H3N2 first emerged in humans in the 1960s and has been circulating in the population since then, often causing seasonal flu epidemics. The virus is transmitted through respiratory droplets when an infected person coughs or sneezes. People infected with H3N2 may experience symptoms similar to other flu strains, including fever, cough, sore throat, body aches, and fatigue.
In recent years, H3N2 has been associated with more severe flu seasons, especially among older adults, young children, and those with weakened immune systems. Vaccines are developed each year to protect against the most common strains of flu, including H3N2, although the virus can undergo genetic changes, which may reduce the effectiveness of the vaccine.
If you’re concerned about H3N2 or flu-like symptoms, it’s essential to consult a healthcare provider for advice on prevention, treatment, and vaccination.
