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influenza A

Influenza A is a highly contagious virus that causes seasonal flu, affecting people and animals, particularly birds and pigs. It can lead to symptoms like fever, cough, sore throat, and body aches. Influenza A viruses are classified into subtypes based on their proteins, leading to different strains. These strains can change frequently, which is why vaccines are updated annually. While many recover without complications, influenza A can be serious, particularly for young children, the elderly, and those with weakened immune systems. It spreads through respiratory droplets, making hygiene and vaccination crucial for prevention.

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    Influenza A is a type of virus that causes seasonal flu, affecting millions globally each year. It is highly contagious and spreads through respiratory droplets when an infected person coughs or sneezes. Symptoms include fever, cough, body aches, and fatigue. Influenza A viruses are categorized into subtypes based on their surface proteins, and they can mutate quickly, which sometimes leads to new strains. This makes annual vaccination important to help protect against the most common circulating strains. People of all ages can catch the flu, but it can be especially severe in young children, the elderly, and those with weakened immune systems.