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Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Thomas J. Brock is a CFA and CPA with more ...

Abstract: Objective: Croup, a respiratory tract infection common in children, causes an inflammation of the upper airway restricting normal breathing and producing cough sounds typically described as ...

Chronic pharyngitis can last several weeks or more and often comes and goes. Viral infections like the flu, common cold, and COVID-19 can cause chronic pharyngitis. Bacterial infections such as strep ...