The Influenza of 1775.
Heberden invited physicians in the provinces to send in accounts of the epidemic of June and July, 1767, but no one seems to have responded. However, the next epidemic catarrh, of November and December, 1775, was made the subject of many communications from all parts of Britain, in response to a circular drawn up by Dr John Fothergill. This was a distinctly catarrhal epidemic, running of the nose and eyes, cough and (or) diarrhoea, being commonly noted.
At Northampton some had “a severe pain in one side of the face, affecting the teeth and ears, and returning periodically at certain hours in the evening, or about midnight, attended with vertigo, delirium and limpid urine during the exacerbation. Some whose cases were complicated with the above symptoms had a general rash, but without its proving critical.... Many of those who escaped the catarrh have been more or less sensible of giddiness, or pains in the head or face,” with limpid urine, etc., as if they had a full attack[652]. The epidemic began in London about the 20th October, and made a slight impression upon the bills of mortality in some weeks of November and December[653]. Grant says that it lasted nearly five months in London, having been attended by the same “comatose” fever which Sydenham associated with the epidemic catarrh of 1675. The fatalities in Grant’s practice occurred late in the epidemic:
“On the 23rd December [1775] I had lost one patient, and soon after two others; all died comatous, owing, as I then imagined, to the remains of the comatose fever of Sydenham, which had raged all the autumn, was complicated with the catarrhous fever, and continued by the wet, warm uncommon weather for the season of the year; and I still [1782] am of opinion that this complication is the reason why the epidemic catarrh of 1775 proved much more fatal than it did in 1782—a fact known to all of us[654].”
A Liverpool writer also says that the catarrh of 1782 “distinguished by the same title,” was a much slighter complaint than the “influenza” of 1775. The latter, however, was a summer epidemic, and was naturally less complicated with pneumonia and bronchitis, whatever the “comatose” fever of 1775 may have been. Grant’s statement that the influenza of 1775 lasted five months in London is borne out by the Foundling Hospital records: on 11 November, there were 16 in the Infirmary with “epidemic fever and cough,” next week 22 with “fevers, coughs and colds,” and so on week by week under the same names until the 9th of March, 1776[655]. At Dorchester it was general after 10th November; about the same time it was in Exeter, where within a week it seized all the inmates, but two children, in the Devon and Exeter Hospital, to the number of 173 persons. The middle of November is also the date of its decided outbreak at Birmingham, at Worcester, and at Chester, where Howard found the prisoners suffering from it. At York in the north, as at Blandford in the south, it is claimed to have begun earlier than in London. At Lancaster it was not seen until three weeks after the accounts of its prevalence in London began to come in, but only three days after it was first heard of in Liverpool. At Aberdeen it was fully a month later than in London. It did not visit Fraserburgh, though there was a putrid fever there very fatal at that time[656].
In many cases the disease assumed the type of an intermittent towards its decline, but bark was not useful (Fothergill, Ash, while Baker says that bark did good when the fever was spent). All the observers agree both as to its slight fatality and its universality. At Chester it attacked 73 out of 97 affluent persons, neighbours in the Abbey Square; at the Cross, inhabited by people in trade, 109 had the disease out of 144; in the House of Industry, not one escaped out of 175; it attacked people in the country rather later than in the town, and less generally, but it was in villages and even in solitary houses.
The unusual prevalence of catarrh among horses (and dogs) is asserted by John Fothergill (“during this time”), Cuming (“after the middle of August very generally in Yorkshire”), Glass (in September), Haygarth (in North Wales, about August and September), Pulteney (“before we heard of it among the human race”). The fullest statement is by Dr Anthony Fothergill, of Northampton:
“This distemper prevailed some time among horses before it attacked the human species. The cough harassed them severely and rendered them unfit for work, though few died. About the same time also it infested the canine species and with great fatality, especially hounds. An experienced huntsman informed me that it ran through whole packs in many parts of England and that several dogs died[657].”
The progress of influenza from other countries towards Britain was so much a matter of rumour or vague statement in the earlier periods that it has not seemed worth while to make a point of it under each epidemic. It happens, however, that there is good evidence of the line of progress of the epidemic of 1775. The afterwards celebrated Professor Gregory, of Edinburgh, encountered it in Italy in the autumn, and followed it all the way home to Scotland. He saw it successively in Genoa, in the south of France, in the north of France, in London, and last of all in Edinburgh, where he himself at length fell ill with it, several of his travelling companions having taken it in Italy two or three months before. In his lectures long after (as reported by Christison, who heard them about 1817) he traced the influenza of 1775 from south to north: “It appears to have broken out somewhere on the north and west coast of Africa, whence it spread not only north into Europe, but likewise eastward to Arabia, Egypt, Syria, Palestine, Asia Minor, Hindostan, China, and was ascertained to have spread over the whole immense empire of the Chinese. From China it returned westward by a northern route through the extensive dominions of Russia and from that country it was sent again over Europe in 1782[658].”