Polk, L D <br/><br/>
Smallpox vaccination after the first birthday--is anyone listening?  [electronic resource] 

 -  Clinical pediatrics  Mar 1971 
 - 131-2 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0009-9228 
<br/><br/><label>Standard No.: </label>10.1177/000992287101000303  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Age Factors<br/>Humans<br/>Infant<br/>Smallpox--prevention & control<br/>Smallpox Vaccine<br/>Vaccination--adverse effects