An estimate of the true value of vaccination as a security against small pox.

Licence: Public Domain Mark

Credit: An estimate of the true value of vaccination as a security against small pox. Source: Wellcome Collection.

Provider: This material has been provided by the Harvey Cushing/John Hay Whitney Medical Library at Yale University, through the Medical Heritage Library. The original may be consulted at the Harvey Cushing/John Hay Whitney Medical Library at Yale University.