Smallpox eradication in the Americas.

in China 200 years before Christ, and it smote search for means of protection against this implacable foe was causing a certain amount of Rome in the second century A.D. Our first knowledge to be gained. Thus it was observed that survivors of an initial attack were protected against later infections, and that the appearance presented by the pustules was one of varying severity. accurate written description dates from the tenth century, when the Persian physician Abu Bekr Ar-Razi (Mohammed ibn Zakariya) produced a ,treatise whose Latin version bears the title De Pestilen tia. The Moslems carried smallpox with them into Europe, where it is estimated to have caused more than 60 million deaths in the seventeenth century. Later, in the year 1707, it I is believed to have slain 14,000 .* people in the City of Paris alone, 1 among them King Louis XV. In a similar manner, havoc wrought Dr. Edward Jenner