How can individuals make informed decisions about travel risks?

The flu is caused by a virus. Viruses are generally passed from person to person through the air when an infected person sneezes or coughs. But the virus can ... 2 days ago ... Influenza A is an acute respiratory viral infection (ARI), a respiratory illness caused by infection with the influenza A virus H1N1, ... What causes influenza (flu)?. The flu is caused by the influenza virus. Common classes of the virus are type A and type B. Each type includes several ... The common cold leads to more health care provider visits and absences from school and work than any other illness each year. It is caused by a virus and is ... Do other respiratory viruses circulate during the flu season? · What causes influenza (flu)? · What are the symptoms of influenza? · When can a person spread ... Dog flu is a common term to describe a contagious upper respiratory infection in dogs caused by the canine influenza virus. May 3, 2022 ... ... cause dull pain and discomfort everywhere. The good news ... What causes body aches when you're sick? When you have the flu, a common cold ... EI is caused by two subtypes of influenza A viruses: H7N7 and H3N8, of the family Orthomyxoviridae. They are related to but distinct from the viruses that cause ... Bird flu, or avian flu, is an infectious type of influenza that spreads among birds. ... But there are 4 strains that have caused concern in recent years: H5N1 ... Bacteria. Bacterial pneumonia can occur on its own or develop after you've had a virus like the cold, flu, COVID-19 or RSV.