Dr. Bradley, physician to the Westminster Hospital, said he looked on Jenner as the author of Vaccine Inoculation, and believed no medical man doubted it. As accidental inoculation with cowpox was proved to keep off smallpox for life, it was matter of course that intentional inoculation would do so also. Not less than 2,000,000 of persons had received Vaccine Inoculation, and he had never known an instance of any one dying of it. One in 300 died of smallpox inoculation in England, and not less than one in 150 throughout the rest of Europe, Asia, Africa and America. Had Jenner settled in London he might have made £10,000 per annum for the first five years, and double that sum afterwards.
Sir Walter Farquhar, physician to the Prince of Wales, had told Jenner that if he had come to London and kept his secret, he would have ensured him £10,000 a year. He had however divulged his secret and lost all chance of emolument. His remedy was a permanent security against smallpox, and had never proved fatal; whilst variolous inoculation, performed in the best manner, cost one life in three hundred.
Mr. Cline, surgeon to St. Thomas’s Hospital, corroborated the opinion that Jenner could have earned £10,000 a year in London by means of his secret. As smallpox was the most destructive of all diseases, its suppression was the greatest discovery ever made in the practice of physic.
Mr. John Griffiths, surgeon to the Queen’s Household and St. George’s Hospital, had inoculated upwards of 1500 persons with cowpox without any untoward symptoms.
Mr. James Simpson, surgeon to the Surrey Dispensary, had inoculated between fifty and sixty without any injury. Considered them perfectly secure from smallpox. A child of nine months covered with crusta lactea resisted all the usual remedies, but on the tenth day after he had inoculated it with cowpox, the crust began to disappear, and the twelfth day was entirely gone.
Dr. Joseph Marshall related his experience as a vaccine inoculator in the Navy and at Gibraltar, Malta, Palermo, Naples, Rome and Genoa. Everywhere was successful. Believed he had operated on 10,000, and never witnessed any ill consequences whatever. On the contrary, children in a weak state of health, after passing through the vaccine infection, began to thrive and become vigorous.
Mr. John Addington, surgeon, had used Jenner’s remedy since 1799 in eighty-one cases. One third of these he had inoculated with smallpox, and subjected to every method of infection he could devise, but found them perfectly proof against the disease.
Dr. Skey, physician to the Worcester Hospital, testified that in the spring of 1801 smallpox was epidemic in Worcester. He inoculated a number of children with cowpox, and none of them took smallpox although constantly exposed to contagion.
Dr. Thornton, physician to the Marylebone Dispensary, had inoculated a patient with cowpox, and afterwards with smallpox at twelve different times during the past three years without effect. He had even slept with a person in natural smallpox, who died, but took no harm. When at Lord Lonsdale’s in the North he had operated on upwards of a thousand, and had completely satisfied himself, and all the medical practitioners in that part of England, that cowpox was a mild disease, hardly deserving the name of a disease. It was not contagious; it never disfigured the person, never produced blindness, nor excited other diseases. It was equally safe whether during the period of pregnancy, or the earliest infancy, or extreme old age.