H1N1 is a subtype of influenza A, but its symptoms can often look very similar to those caused by other respiratory viruses and seasonal flu. From fever and body aches to cough, sore throat and a blocked or runny nose, the overlap can make it difficult to identify the infection based on symptoms alone.
The fact actually is that just depending on the symptomatology, it is very difficult to differentiate between H1N1 or any other viral respiratory illness.
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Although it sounds a completely different entity from common flu, the matter of fact is that it is not. H1N1 is actually a subtype of influenza A. The Influenza viruses that commonly cause seasonal flu in humans are H3N2, H1N1 and Influenza B viruses. The phrase “common flu” is often misleading, they may mean seasonal influenza, but the term may not distinguish between the Seasonal flu, influenza Subtypes and other common respiratory viruses.
The symptoms produced by most of the viruses are usually indistinguishable, and they mimic each other clinically. For example, all the respiratory viruses which cause upper respiratory tract involvement (Influenza and its subtype and other common viruses like RSV etc.) can actually present with high grade sudden fever, body ache, malaise, sore throat, dry cough, runny or blocked nose. There can be some clues but no perfect rules in distinguishing between the Influenza viruses versus other viruses, like the other viruses responsible for common cold can cause more nasal and throat involvement with lesser body pains and malaise.
We must understand that there is no single, unique symptom that distinguishes the H1N1, from other viruses. One misconception is that H1N1 means severe flu, that is not necessarily true.
Then, why we should worry about these viruses- because same virus can behave differently in different individuals, depending upon their underlying medical conditions, age, type of medication they are taking. Patients with poor immune system may be at higher risk of developing serious complications of the viral illness. This is the population which requires testing and early treatment for better outcomes.
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The test done is RT-PCR and Rapid tests for Influenza. People with severe symptoms like breathing difficulty, chest pain, worsening or persistent fevers, chest pain, confusion, drowsiness need to seek immediate medical care. These complications are common in immunocompromised patients, young child, elderly person, pregnant woman or person with important underlying illness.
We should keep in mind that symptoms alone cannot be the distinguishing factor.
So it’s not necessary that we need to know the exact name of the virus to know when you need medical attention. The severity of the illness and the person's risk factors often matter more than whether the virus is called H1N1, H3N2 or influenza B.
Disclaimer: The information provided in the article is shared by experts and is intended for general informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified healthcare provider with any questions you may have regarding a medical condition.
