Abstract

References
1.
James
S. P.
(1909 ) Smallpox and Vaccination in India , Calcutta.
2.
Millard
K.
(1942 ) Brit. med. J. (ii), 678 .
3.
Rogers
L.
(1925 ) J. State Med. , 33 , 501 .
4.
Rogers
L.
(1926 )Spec. Rep. Ser. Med. Res. Coun., No. 106.
5.
Rogers
L.
(1942 ) The Fight Against Disease , 31 , 6 .
