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A fact sheet that summarizes the studies on the health effects of exposure to environmental (secondhand) tobacco smoke.

Resumen de información revisada por expertos acerca del tratamiento del cáncer de vesícula biliar.

Bronchitis is a condition in which the airways in the lungs become inflamed and cause coughing, often with mucus, or wheezing. Acute bronchitis goes away after a few weeks but chronic bronchitis last for months and can be serious. Learn more about symptoms and treatment, and how to participate in clinical trials.

Antibiotic prescribing guidelines for adults in outpatient settings are used to ensure appropriate treatment of common illnesses and improve patient outcomes.

Human parainfluenza viruses (HPIVs) usually spread from person to person through air by coughing and sneezing, touching...

Human parainfluenza viruses (HPIVs) belong to the Paramyxoviridae family. There are four types (1 through 4) and two subtypes (4a and 4b) of HPIVs.

Human parainfluenza viruses (HPIVs) commonly cause upper and lower respiratory illnesses. After infected, takes about 2-7 days before develop symptoms: fever, runny nose, and cough.

Read about the negative health effects of particle pollution — and find steps you can take to prevent them.

Learn how ground-level ozone can harm your health — and what you can do to protect yourself.

Air Pollutants