Trachea and bronchial tree, inflammation causing bronchitis. Acute or chronic inflammation. Viral bronchitis is caused by a virus and is a contagious Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/trachea-and-bronchial-tree-inflammation-causing-bronchitis-acute-or-chronic-inflammation-viral-bronchitis-is-caused-by-a-virus-and-is-a-contagious-image576150924.html

RF2TD9XAM–Trachea and bronchial tree, inflammation causing bronchitis. Acute or chronic inflammation. Viral bronchitis is caused by a virus and is a contagious

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