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           | Description | 
           A poster attached to a curbside mailbox offering advice to World War II servicemen:  Penicillin cures  gonorrhea in 4 hours. | 
          
          
           | Date | 
           circa 1944 | 
          
          
           | Source | 
            http://ihm.nlm.nih.gov/images/A20824 | 
          
          
           | Author | 
           Unknown | 
          
          
           Permission ( Reusing this file) | 
           
            
             
              | Public domainPublic domainfalsefalse | 
              
             
            
             
                | 
              This image is in the  public domain because it contains materials that originally came from the  National Institutes of Health. Please ensure that this image was actually created by the US Federal government; the NIH frequently uses commercial images which are not public domain. Email the source site if it is not clearly stated that this specific work is in the public domain. | 
              
               
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