In this video, we discuss mainly influenza and RSV. These viruses can cause upper respiratory tract infections (like rhinitis, pharyngitis, and laryngitis), or lower respiratory tract infections (like tracheitis, bronchilitis, and pneumonia). For more videos and questions, visit - https://www.macrophage.co. Subscribe - https://goo.gl/EMRlRa. Support us on Patreon - https://goo.gl/bhmrgJ.

Croup is an infection of the trachea, and can present with stridor.

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