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Main symptoms of infectious pneumonia | By Mikael Häggström.When using this image in external works, it may be cited as:Häggström, Mikael. “Medical gallery of Mikael Häggström 2014”. WikiJournal of Medicine 1 (2). DOI:10.15347/wjm/2014.008. ISSN 20018762. Public Domain.orBy Mikael Häggström, used with permission. – All used images are in public domain., Public Domain, https://commons.wikimedia.org/w/index.php?curid=5781948