The epidemic of 1819 spread all over East Anglia[1109]. At Lynn there had been a good deal of the disease three years before; in 1819 there were so many deaths from it that in June the clergy ordered the smallpox burials to be specially marked in the register, from which date until the end of August they numbered forty. At Yarmouth the epidemic was still raging at the end of 1819. Of ninety-one surgeons in Norfolk and Suffolk who replied to a circular issued by Cross, all but eleven saw cases of smallpox in 1819, three had had cases in 1818, two had seen the disease in 1817, and one in 1816. Generally speaking, the disease had been in abeyance in those counties for seven years; a surgeon of Prudham, whose practice covered eleven parishes, had seen no case of smallpox for twelve years before. The largest number of deaths in the practice of any one surgeon was twelve. Twenty-eight surgeons together had 598 smallpox patients, with 97 deaths; but in their districts there had been 180 deaths besides from the same disease, in families unvisited by them.
The accounts of this epidemic in London are most meagre. In the bills of mortality, now become quite inadequate to the whole capital, the deaths rose to 1051 in 1817, fell next year to 421, and in 1819 were 712. But it was in the year 1819 that the admissions to the smallpox hospital were most numerous, namely, 193, the highest number since the epidemic of 1805, when they were 280 in the year. The horny or crystalline kind of smallpox was found in London, as elsewhere[1110].
In the spring of 1818, “smallpox post vaccinationem” was frequent among the boys of Christ’s Hospital[1111]. None of the cases proved fatal that year, but there was a death in the school from smallpox in 1820, probably the last fatality from that cause in the history of the school[1112].
A few casual notices of smallpox in England in the years following the epidemic of 1817-19 lead one to suppose that the disease did not again fall to that apparent extinction which it had reached before the last epidemic began. It is heard of in and around Chichester in 1821; nineteen surgeons who supplied Dr John Forbes with information had seen about 130 to 140 cases, with 20 deaths; about 80 of the cases were in persons previously inoculated with cowpox, 19 cases (or the most of 19) were in persons previously inoculated with smallpox[1113]. This was doubtless the experience of paying patients only; according to the East Anglian precedent of 1819 there would have been twice as much smallpox in families who received no professional treatment. Canterbury is another town from which a rapidly spreading epidemic of smallpox is reported—in the winter of 1823-4. It continued into the winter and spring of 1824-25, among the poor, fatal cases being by no means rare. Dr Carter frequently saw children exposed in the streets of Canterbury with smallpox upon them; he appealed to the mayor to have some check imposed on the spread of contagion, but nothing was done, and smallpox was still prevalent at the date of his writing in the autumn of 1824[1114]. The same year there was a severe epidemic at Oxford. These were probably only samples of epidemics filling the interval from 1819 to 1825, when smallpox again became general.
Extent of Inoculation with Cowpox or Smallpox, 1801-1825.
Twenty-five years had now passed since cowpox became the rival or substitute of the old matter of inoculation. The history at this point requires some notice of the extent to which each of those methods was practised. Professional opinion, or that part of it which found expression, was for the most part in favour of cowpox. The Smallpox and Inoculation Hospital of London took the lead, under Woodville, in substituting cowpox for smallpox, and other public institutions, such as the Newcastle and Whitehaven Dispensaries, quickly followed. The new mode was practised upon larger numbers than the old. At the Newcastle Dispensary the inoculations of smallpox from 1786 to 1801 had been 3268; the inoculations of cowpox from 1801 to 1825 were 20,264. At the Whitehaven Dispensary 173 children were inoculated with smallpox in 1796, the total inoculations before that having been 906. To the end of 1803 the total vaccinations were 490, of which many were done during the severe outbreak of smallpox in 1803.
In Glasgow, where the old inoculation was either little practised or of little use, the Jennerian mode was received with favour, and was offered to the children of the working classes gratuitously at the Hall of the Faculty of Physicians and Surgeons. From the 15th of May, 1801, to the 31st of December, 1811, these public vaccinations numbered 14,500, an average of about 1400 in the year. In the next seven years they declined as follows:
| 1812 | 950 | |
| 1813 | 1162 | |
| 1814 | 875 | |
| 1815 | 926 | |
| 1816 | 980 | |
| 1817 | 820 | |
| 1818 | 650 |
On the revival of smallpox the Glasgow Cowpock Institution was opened on 28 August, 1818, and vaccinated 146 to the 1st of January, 1819. The smaller demand for even gratuitous vaccination of infants after 1812 was owing to the very small amount of smallpox in Glasgow in those years; in the six years, 1813-19, there were said (by Cleland) to have been only 236 deaths from smallpox in a total of 22,060 deaths from all causes, or 1·07 per cent. of all deaths[1115]. Not more than a fourth part of all the infants born in Glasgow had been vaccinated in the years 1812 to 1818, and that was the time when smallpox was at its lowest point among the infantile causes of death. In some of those years when smallpox was in abeyance measles was most destructive. It was currently said in Glasgow that vaccination, if it discouraged smallpox, predisposed to measles, an opinion of the populace which Malthus shared from the à priori point of view. But in a survey of the individual cases in their practice the Glasgow doctors did not find that those were the relevant circumstances, whatever the truly relevant things may have been. Thus, Dr Robert Watt, a good observer and cautious reasoner, who became president of the Glasgow faculty, wrote: “The only family within my knowledge where three died of the measles in 1808 was one where none of the children had been either vaccinated or had had the smallpox. I met with another family where two died in the same circumstances”—that is to say, five children, in two families, escaped smallpox to die of measles, no artificial interference having been attempted[1116].
Manchester was another populous district where vaccination had been freely offered to the poorer classes. Roberton, writing in 1827, says that it had been on the decline for several years, and gives the following figures for the earlier period, May, 1815, to May, 1823[1117]: At the Manchester Lying-in Charity the annual average of deliveries was 2667, while the number of infants brought back for vaccination averaged 1392 in a year. During the same eight years public vaccinations at the Manchester Infirmary averaged 1700 annually. Great numbers of infants were said, also, to have been vaccinated gratuitously by druggists. The decline in the number of vaccinations, which had perhaps begun some time before (as at Glasgow), was shown conclusively by the returns for the two years May, 1824—May, 1826. The births at the Lying-in Charity averaged 3285 per annum; but the vaccinations in the infants brought back to the charity, together with those brought to the Manchester Infirmary, averaged only 1309 per annum.