398 DISEASES OF SWINE 



There will always be found those who oppose any new method 

 of treatment. Even as well proved as are the effects following the 

 use of small-pox vaccination, yet there are thousands of people in 

 the United States and in other countries who condemn vaccination, 

 and insist that it is a means of spreading small-pox and other dis- 

 eases instead of being a means of checking the spread of the disease. 

 Some of them even go so far as to say that they are just as well pro- 

 tected against the disease without being vaccinated as their neigh- 

 bor who has been treated with the small-pox vaccine. Every few 

 years there grows up in certain parts of the country a considerable 

 colony of these unvaccinated people. It is not long until small- 

 pox sees the opening, and the result is a disastrous outbreak of the 

 disease, with the result that a large number of lives are lost which 

 could otherwise have been saved. A very good example of what 

 we may expect in this line was seen a few years ago in the outbreak 

 which occurred in Montreal, Canada. 



In the city of Montreal a very strong opposition had grown up 

 against vaccination. As a result, a large part of the population of 

 the city were not vaccinated for a number of years, and these un- 

 vaccinated individuals laughed with scorn at those who made use 

 of such a method of protecting themselves from the disease. Mon- 

 treal went along without any small-pox for a number of years, and 

 the advocates of no vaccination kept on increasing in numbers. 



Finally, a negro porter, on one of the Pullman cars running from 

 Chicago to Montreal, was taken sick while in Montreal with what 

 afterward proved to be small-pox. When taken sick he was in a 

 large rooming house or hotel. The disease rapidly took hold in 

 this new locality. The hotel was closed and the guests allowed to 

 scatter to different parts of the city. The disease, in this manner, 

 was spread all over the city, and it rapidly took hold like a prairie 

 fire before the wind. The result was one of the most frightful out- 

 breaks of small-pox in the history of this continent. There were 

 over 1000 deaths, and the lesson proved a most costly one to the 

 people of this prominent Canadian city. 



In the case histories which will be given in a following section 

 several herds will be shown in which the double method of treat- 

 ment was given, and where healthy animals were left in the pens 

 unprotected by either single or double methods of treatment. 



