The respiratory tract can be infected by many different viruses, which cause many different diseases. The diseases that can be caused by viruses include:
 - Common Cold
 - Influenza
 - Viral Pneumonia
 - SARS
 - MERS
 - Measles (Rubeola)
 - Rubella (German Measles)
 - Chickenpox and Shingles

The Different Viral Infections of the Respiratory System

Viruses are the most frequent cause of respiratory tract infections. Viral infections are tougher to combat. Fortunately, many of these diseases are mild and self-limiting.

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The respiratory system is responsible for bringing oxygen into the body and removing carbon dioxide from it. It includes the nose, lungs, and other structures involved in breathing and gas exchange.

Respiratory System

https://openstax.org/details/books/microbiology/

Microbiology covers the scope and sequence requirements for a single-semester microbiology course for non-majors. The book presents the core concepts of microbiology with a focus on applications for careers in allied health. The pedagogical features of the text make the material interesting and accessible while maintaining the career-application focus and scientific rigor inherent in the subject matter. Microbiology’s art program enhances students’ understanding of concepts through clear and effective illustrations, diagrams, and photographs.

Microbiology is produced through a collaborative publishing agreement between OpenStax and the American Society for Microbiology Press. The book aligns with the curriculum guidelines of the American Society for Microbiology.

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The respiratory tract can be infected by many different types of bacteria. Although the diseases that they cause may range from mild to severe, in most cases, the microbes remain localized within the respiratory system.

Bacterial Infections of the Respiratory System

Viral Infections of the Respiratory System

Respiratory mycoses are caused by fungi that inhabit the environment. These infections are generally transmitted via inhalation of fungal spores and cannot be transmitted between humans.

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