H3N2 Influenza: Sings and Symptoms, Treatments and Precautions

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What is H3N2 Influenza?

A subtype of influenza called H3N2 In India, a virus has been rapidly spreading, resulting in 90 cases and 2 fatalities thus far. According to reports, the ailment causes a fever that lasts three to five days as well as a cough and cold that can last up to three weeks. Compared to other influenza viruses, the H3N2 subtype is more likely to result in hospitalisations, and symptoms can include a persistent cough, headache, fever, and sinus-related symptoms. Although the condition is typically moderate in groups who are more susceptible, it can become severe and increase the risk of complications and even death. One needs to be sent to the hospital right away if they are having trouble breathing, have low blood pressure, rapid breathing, bluish lips, seizures, or confusion.

“A subtype of influenza is influenza H3N2. a virus that can harm people’ respiratory systems. Individuals can have different signs and symptoms of the H3N2 influenza-related severe sickness, but generally speaking, the following signs and symptoms may point to a more serious illness: “according to Dr. Jayalakshmi TK, Consultant, Pulmonology, Apollo Hospitals, Navi Mumbai.

Symptoms H3N2 Influenza (Severe)

  1. Breathing problems or shortness of breath may be signs of pneumonia or other respiratory issues.
  2. Severe or persistent vomiting: Serious H3N2 influenza might manifest as severe or persistent vomiting. Dehydration may result as a result.
  3. Dehydration: A person with the H3N2 influenza may get dehydrated if they do not consume enough fluids or if they have severe vomiting or diarrhoea.
  4. Low blood pressure: If a person with severe H3N2 influenza is dehydrated or succumbs to sepsis, low blood pressure may develop.
  5. Rapid breathing: Rapid breathing can happen when a person with severe H3N2 influenza has trouble breathing or has low oxygen saturation.
  6. Worsening of pre-existing chronic illnesses: H3N2 influenza can exacerbate pre-existing chronic illnesses including diabetes or asthma.
  7. Low blood oxygen levels, which can occur with severe respiratory infections like pneumonia, which can be a consequence of influenza, might be indicated by bluish lips or a face.
  8. Fever or inflammation in the brain, which can happen with severe instances of influenza or other viral illnesses, can cause seizures or convulsions.
  9. Fever or inflammation in the brain, which can happen with severe instances of influenza or other viral diseases, can cause confusion or disorientation.
  10. With both H3N2 and other kinds of influenza, a high fever that lasts longer than three days is a typical symptom that may also indicate a more serious case of the sickness.
  11. The H3N2 influenza virus causes severe exhaustion or weakness because the body expends a lot of energy fighting it.
  12. A viral respiratory infection that primarily affects the upper respiratory system is chest pain or pressure.
  13. Those infected with the H3N2 influenza virus may experience low oxygen saturation (hypoxemia), particularly in cases of severe disease. The respiratory symptoms of the H3N2 influenza virus, such as coughing, shortness of breath, and chest tightness, might lower oxygen saturation levels.

Common Signs of H3N2 Influenza

  • High fever: One of the most typical signs of H3N2 infection is a sudden onset of high fever. The fever may last 3 to 4 days and have a temperature range of 100 to 104 degrees Fahrenheit.
  • Cough: Another typical H3N2 virus symptom is a dry, lingering cough. A severe cough that lasts for several weeks is possible.
  • Sore throat: Another typical sign of H3N2 infection is a sore throat. Other symptoms, like as fever and cough, may also be present.
  • Headache: H3N2 influenza patients frequently have headaches. They might be severe and enduring.
  • Weakness and fatigue are typical signs of H3N2 illness. Even after the other symptoms have subsided, they could persist for a few weeks.
  • Body aches: Those with H3N2 influenza frequently experience body aches, particularly in the back, arms, and legs. They might be severe and enduring.
  • Chills: A common sign of H3N2 infection is chills. Fever and bodily aches could be present as well.

Current Treatments: According to Dr. Adalja, H3N2 is treated in the same manner as previous influenza viruses. As a result, one of the following four flu-specific antiviral drugs may be used to treat it:

  • oseltamivir phosphate (Tamiflu)
  • zanamivir (Relenza)
  • peramivir (Rapivab)
  • baloxavir marboxil (Xofluza)

Prevention: Together with antiviral therapy, the management of public health also involves taking precautions for oneself, such as:

  • Frequent hand washing and adequate hand drying
  • Use tissues and properly dispose of them, cover your mouth and nose when you cough or sneeze, and practise good respiratory hygiene.
  • Isolation of persons who are ill, feverish, and showing other influenza signs as soon as possible
  • Limiting one’s proximity to sick persons
  • Not touching one’s lips, nose, or eyes



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