Influenza sign

Description

This is a historical sign from 1918 regarding influenza complicated by pneumonia.

Credit

Public domain/ courtesy, the National Library of Medicine/ Department of Health, Chicago, Ill, creator/ John Dill Robertson, contributor/ 1918

Source

http://ihm.nlm.nih.gov/luna/servlet/detail/NLMNLM~1~1~101447458~156547?qvq=q:influenza+;sort:Title,Subject_MeSH_Term,Creator_Person,Creator_Organization;lc:NLMNLM~1~1&mi=10&trs=59