Oliver Wendell Holmes wrote about, FTP, the "contagiousness" of what condition?
An essay on this declares that the "Philadelphia Practice of Midwifery" shockingly doesn't know that it can be "communicated to every pregnant woman who happens to come within its sphere." Oliver Wendell Holmes wrote about, FTP, the "contagiousness" of what condition? 
An essay on this declares that the "Philadelphia Practice of Midwifery" shockingly doesn't know that it can be "communicated to every pregnant woman who happens to come within its sphere."
puerperal fever (or "the contagiousness of puerperal fever")