Written by Muskan Gupta | Published : December 22, 2025 9:03 PM IST
A sharp increase in body temperature is also one of the initial symptoms of H3N2 flu. The relief can take a very short time, and it may accompany fever, chills, sweats and a case of weakness. The fever that develops can be moderate to high and may take several days in most instances. In case the fever fails to resolve itself or recurs continuously, medical consultation is necessary.
Another predictable symptom of the H3N2 infection is the dry or persistent cough. This could begin as a slight irritation and progressively deteriorate. There are also a lot of individuals who complain of a sore throat or scratchy throat, and they find it hard to swallow or talk. Coughing fits may disrupt sleep and cause lethargy in a few instances.
Similar to other flu viruses of the season, H3N2 is also known to trigger nose symptoms. Early signs of infection may be in the form of a runny nose, blocked nose or frequent sneezing. Although these symptoms might not appear serious initially, there are chances that they tend to improve and contribute to the discomfort, unlike in the presence of fever and cough.
Body pain and muscle aches are also one of the warning signs of flu. H3N2 usually causes the person to experience pain at the back, legs, and joints as well as a headache. It is normally accompanied by acute fatigue, despite having taken a reasonable amount of sleep. Unused tasks can begin to be depleted in this stage.
Despite the fact that H3N2 is primarily a respiratory infection, other individuals can also have stomach symptoms, including diarrhoea or vomiting. The symptoms are more prevalent in children though they also appear in adults. When the symptoms persist, then loss of appetite and dehydration might take place.
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