Jim Bob Pharmaceuticals is testing a new anti-coughing drug, "Maplex". In 400 volunteers who took Maplex, 250 said they coughed less. Does this prove that Maplex is an effective anti-coughing drug? A. Not yet. We need to see whether the same percent of volunteers who took a placebo also report coughing B. There is no way to either prove or disprove that Maplex reduces coughing C. Yes

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Respiratory Infections

Respiratory infections are infectious diseases of the respiratory tract that are mostly caused by bacteria and viruses. They cause infections of the throat, sinuses, airway path, and lungs. Respiratory infections are typically divided into two types: upper tract respiratory infection and lower tract respiratory infection.