National geographic :  mysteries of a virus / 
Susan Goldberg. 
 - Washington, DC :  National Geographic Partners, LLC,  February 2021. 
 - 142 pages ;  26 cm. 
 -  V.239, No.2 .
<br/><br/><label>ISSN: </label>00279358 
<br/><br/><label>Subjects--Topical Terms: </label><br/>National Geographic--May 2017.