How is influenza A transmitted?

Oct 18, 2025 Source: Cainiu Health

Dr. Ren Yi

Introduction

In general, influenza A is mainly transmitted through respiratory droplets, close contact, airborne aerosols, contact with contaminated objects, and mother-to-child transmission. It is recommended to take proper personal protective measures in daily life, wear masks correctly when going out, and avoid crowded places. Wash hands frequently with soap or handwash and running water.

Generally, influenza A is mainly transmitted through droplets, close contact, airborne aerosols, contact with contaminated objects, and mother-to-child transmission. The details are as follows:

1. Droplet transmission: When individuals infected with influenza A cough, sneeze, or talk, they release virus-containing droplets into the air. Healthy individuals may inhale these droplets, allowing the virus to enter the respiratory tract and cause infection. This mode of transmission is particularly common in crowded places, where droplets can spread over short distances through the air.

2. Close contact transmission: Close interaction with an infected individual may result in direct contact with their respiratory secretions or saliva. The virus can then enter a healthy person's body through skin or mucous membranes, leading to infection. This commonly occurs among family members or coworkers.

3. Airborne aerosol transmission: Droplets produced when an infected person coughs or sneezes can form tiny aerosol particles that remain suspended in the air for extended periods and travel over long distances. Inhalation of these aerosols by healthy individuals may lead to influenza A infection. This transmission route poses a higher risk in enclosed spaces.

4. Transmission via contaminated objects: Objects touched by individuals with influenza A may become contaminated with the virus. If healthy individuals touch these contaminated surfaces and then touch their mouth or nose without washing hands promptly, the virus can enter their body through the hands and cause infection.

5. Mother-to-child transmission: Pregnant women infected with influenza A may transmit the virus to the fetus through the placenta, or during childbirth via exposure to respiratory secretions or blood, potentially causing neonatal infection. However, this mode of transmission is relatively rare.

It is recommended to take proper personal protective measures daily: wear masks correctly when going out and avoid crowded places; wash hands frequently with soap or handwash and running water; maintain indoor ventilation, and regularly disinfect commonly used items to reduce the risk of influenza A infection.

View All

Is dizziness after influenza A a sign of recovery?

Under normal circumstances, "Jia Liu" refers to Influenza A H1N1. Whether dizziness following Influenza A H1N1 indicates recovery depends on the specific circumstances. If dizziness is the only symptom present without other accompanying symptoms, it usually suggests the condition is improving. However, if dizziness is accompanied by other systemic symptoms such as headache, tinnitus, or fatigue, it may not indicate improvement. If any discomfort persists, prompt medical attention is recommended.

View Full Answer

What medication can be taken to prevent H1N1 flu in advance?

In general, influenza A can be prevented through vaccination and the use of antiviral medications. Drugs used for prophylaxis should be taken under medical supervision and commonly include oseltamivir phosphate capsules, zanamivir inhalation powder, peramivir chloride injection, baloxavir marboxil tablets, and Lianhua Qingwen capsules. It is also important to maintain good daily habits, such as frequent handwashing.

View Full Answer

What are the differences between influenza and mycoplasma pneumonia?

In general, the main differences between influenza and mycoplasma pneumonia include different causative pathogens, varying symptom presentations, differing levels of contagiousness, distinct high-risk populations, and different treatment medications. If respiratory discomfort occurs, it is recommended to seek medical attention promptly for an accurate diagnosis. In daily life, it is important to frequently wash hands, wear masks, and avoid crowded places; when symptoms such as fever and cough appear.

View Full Answer

What does a high level of amyloid A protein indicate?

Infection is a common cause of elevated marker levels. During bacterial infections such as pneumonia and pyelonephritis, serum amyloid A protein rapidly increases within hours, and the extent of elevation often correlates with the severity of the infection. Viral infections, such as influenza and coronavirus infection, can also lead to increased levels, although the rise is typically less pronounced than in bacterial infections, making it a useful adjunct for differentiating types of infection.