Influenza A and B 2 Flu Screening

This test identifies the presence of influenza A and B viral nucleoprotein antigens in respiratory specimens and displays the result qualitatively (positive vs. negative).

Influenza, or the flu, is a respiratory disease caused by influenza type A, B, C, or D viruses. It spreads primarily through airborne droplets when a person talks, coughs, or sneezes. The flu affects around 8% of people annually, spreading more in colder months and sometimes causing local epidemics or, less frequently, global pandemics.

Symptoms of the flu include:

• Fever
• Cough
• Congestion
• Runny nose
• Sore throat
• Head and body aches
• Fatigue

Most people experience mild, short-lived symptoms, but the flu can cause serious complications in children, older adults, pregnant women, and those with certain medical conditions. Influenza A and B are the main types causing seasonal epidemics, while influenza C causes milder symptoms, and influenza D primarily affects cattle.

Annual flu vaccines are developed based on expected circulating strains, reducing but not eliminating the flu's impact. Accurate diagnosis and treatment remain important.

"The flu" specifically refers to illnesses caused by influenza viruses. Terms like "stomach flu" or using "flu" for any respiratory illness are incorrect.

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