Symptoms of influenza A, distinguish them

Influenza A, also known as influenza A (H1N1), is an acute respiratory infectious disease. Its pathogen is a new type of influenza A (H1N1) virus that spreads among the population. It spread widely around the world in 2009. What are the characteristics of its disease? How is it different from the common cold?

A: Rapidly develops a high fever (over 37.8 degrees) within 3-6 hours

And there will be rapid systemic muscle soreness

General: Gradual onset of fever and generalized muscle aches

A: About 80% or more will have severe headaches

General: Mild headache

A: No runny nose but cough and sore throat

General: runny nose and cough

A: Almost no sneezing (less common)

General: Sneezing

A: A high fever above 37.8 degrees will last for 3-4 days

General: Occasionally, high fever

A: Severe systemic muscle aches and joint pains

General: Mild generalized muscle aches, joint pains

A: Most people will have fever and chills.

General: Occasionally, there will be chills

A: Continuous severe fatigue and weakness

General: Mild fatigue

A: Tonsils will not swell

General: Tonsils will swell

A: There will be severe chest pressure

General: No chest pressure

The incubation period is generally 1 to 3 days (several hours to 4 days). Clinically, there may be an acute onset of high fever, severe systemic symptoms but not severe respiratory symptoms, manifested as chills, fever, headache, fatigue, body aches, etc. The body temperature can reach 39-40oC, and usually subsides after 2-3 days. Systemic symptoms gradually improve, but upper respiratory tract symptoms such as nasal congestion, runny nose, sore throat, and dry cough are more obvious. A small number of patients may have mild gastrointestinal symptoms such as epistaxis, loss of appetite, nausea, constipation, or diarrhea. Physical examination showed that the patient looked acutely ill, with flushed cheeks, mild congestion of the conjunctiva and tenderness of the eyeballs. He or she may develop severe pneumonia, acute respiratory distress syndrome, pulmonary hemorrhage, pleural effusion, renal failure, sepsis, shock, respiratory failure and multiple organ damage. The patient's original underlying disease may also worsen, leading to death.