The cases here referred to, of failure of vaccination to protect even for a few years, are probably only a small fraction of those that occurred, since only in exceptional cases would a doctor be able to keep his patients in view, and only one doctor here and there would publish his observations. The controversy was carried on with unusual virulence, hence perhaps the reason why the public paid so little attention to it. But unfortunately both the heads of the medical profession and the legislature had committed themselves by recognising the full claims of Jenner at too early a date and in a manner that admitted of no recall. In 1802, as already stated, the House of Commons, on the Report of its Committee, and the evidence of the leading physicians and surgeons of London—a large number of whom declared their belief that cow-pox was a perfect security against small-pox—voted Jenner £10,000. When therefore the flood of evidence poured in, showing that it did _not_ protect, it was already too late to remedy the mischief that had been done, since the profession would not so soon acknowledge its mistake, nor would the legislature admit having hastily voted away the public money without adequate reason. The vaccinators went on vaccinating, the House of Commons gave Jenner £20,000 more in 1807, endowed vaccination with £3,000 a year in 1808, and after providing for free vaccination in 1840, made the operation compulsory in 1855, and enforced it by penalties in 1867. VACCINATION AND THE MEDICAL PROFESSION