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Respiratory infections primarily affect the lungs and airways, presenting a significant burden on public health. Caused by various agents, including viruses like influenza and RSV, as well as bacteria such as Streptococcus pneumoniae, these infections can range from mild to severe. Diagnostic tests are vital for appropriate treatment and may include culture tests, PCR, and antigen assays. Respiratory infections are especially concerning in vulnerable populations such as infants, the elderly, and immunocompromised individuals. Accurate and quick diagnosis is essential for timely intervention and to prevent the spread of the infection.