Infection and Inflammation

H3N2 Virus Transmission Symptoms

What is the H3N2 Virus Transmission?

H3N2 is a type of influenza virus that can cause respiratory illness in humans. It is a subtype of the H3 virus, which is one of the three main types of influenza viruses that circulate among humans, along with H1 and H2. H3N2 viruses are known for their ability to mutate, which can make it more difficult to produce effective vaccines against them.

H3N2 viruses are transmitted from person to person through respiratory secretions, such as saliva, mucus, or nasal secretions. The virus is spread when an infected person talks, coughs, or sneezes, releasing droplets into the air that can be inhaled by others. The virus can also be transmitted by touching a surface or object contaminated with the virus and then touching the nose, mouth, or eyes.

The Symptoms of H3N2 Infection

The symptoms of H3N2 infection are similar to those of other types of influenza, including fever, cough, sore throat, runny nose, body aches, fatigue, and headache. Some people may also experience vomiting and diarrhoea. The symptoms of H3N2 infection typically begin one to four days after exposure to the virus and can last up to a week.

H3N2 infections are caused by the H3N2 influenza virus, which is a subtype of the H3 virus. The H3 virus is one of the three main types of influenza viruses that circulate among humans, along with H1 and H2. Influenza viruses are classified based on the proteins on their surface, which are called haemagglutinin (H) and neuraminidase (N). The H3N2 virus is characterized by the presence of H3 haemagglutinin and N2 neuraminidase proteins on its surface.

How to Prevent the Transmission of H3N2?

There are several ways to prevent the transmission of H3N2 and other types of influenza. One of the most effective ways is to get vaccinated against the flu. Flu vaccines are available in the form of a shot or a nasal spray, and they are typically made from a combination of inactivated or weakened virus strains. The Centres for Disease Control and Prevention (CDC) recommends that everyone 6 months of age and older get a flu vaccine every year.

Other ways to prevent the spread of H3N2 and other influenza viruses include:

  • Washing your hands frequently with soap and water, or using an alcohol-based hand sanitizer
  • Avoiding close contact with people who are sick
  • Covering your nose and mouth with a tissue or your elbow when you cough or sneeze
  • Staying home when you are sick

It is also important to practice good respiratory hygiene by covering your mouth and nose with a tissue when you sneeze or cough, and disposing of used tissues immediately. Avoiding touching your eyes, nose, and mouth can also help to prevent the spread of the virus.

While the flu can be a serious illness, most people who are infected with H3N2 or other types of influenza recover within a week or two. Some people, however, may be at higher risk of developing complications from the flu, including pneumonia, bronchitis, sinus infections, and ear infections. Children, older adults, and people with certain underlying health conditions, such as asthma or heart disease, are more likely to experience complications from the flu.


In conclusion, H3N2 is a type of influenza virus that can cause respiratory illness in humans. It is transmitted from person to person through respiratory secretions and can cause symptoms such as fever, cough, and body aches. The best way to prevent the spread of H3N2 and other types of influenza is to get vaccinated and practice good hygiene.

Precautions to be taken (Source)
  • Citizens should wear face masks, especially while going to public places.
  • High-risk patients should get vaccinated
  • Avoid going to public places if unwell
  • Vaccination against influenza is a must
  • Avoid self-medication.
  • Follow a good diet, take rest and drink plenty of fluids

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