2013.07.04

不接種疫苗的危險

兒童未接種疫苗的比例越來越高,已經對公共衛生構成威脅。

影像來源/ SOURCE: CENTERS FOR DISEASE CONTROL AND PREVENTION (various survey methods) ; GRAPHIC BY JAN WILLEM TULP

影像來源/ SOURCE: CENTERS FOR DISEASE CONTROL AND PREVENTION (various survey methods) ; GRAPHIC BY JAN WILLEM TULP

© SCIENTIFIC AMERICAN, A DIVISION OF NATURE AMERICA, INC.ALL RIGHTS RESERVED.