Isolated places.—Has it ever been shown that individuals completely isolated from communication with communities where influenza is present have, during an epidemic, developed the disease? Leichtenstern, after a comprehensive review, concludes as follows: “We have not a single example on record where influenza has attacked individuals in completely isolated localities, as on mountain tops and mountain passes. Study of this has been undertaken in Switzerland by F. Schmid. The same has been true of ships at sea, as has been shown chiefly from the English Marine Reports. There have been reports of influenza occurring in mid-ocean and particularly in the earlier epidemics, but the information has been insufficient.”
Parkes at even an earlier period observed: “I cannot but consider that we require better evidence of ships being attacked in mid-ocean. In some of the quoted instances the ships had been at a port either known to be infected or in which influenza was really present, although it had not become epidemic. As we are ignorant of the exact period of incubation some men may have been infected before sailing.”
Critical investigation into stories of spontaneous infection in isolated localities such as ships at sea and island lighthouses will quite invariably demonstrate that these popular reports have been distortions of the actual facts. One or two examples will suffice. Abbott records an example: “An impression having gained some credence that influenza had appeared on board the squadron of naval vessels which sailed from Boston in December, 1889, while on their course across the Atlantic and before their arrival in Europe, a letter was addressed by the writer to the Bureau of Medicine and Surgery of the United States Navy for information upon this point, to which a reply was received, as follows:
“The ‘Chicago,’ ‘Boston,’ ‘Atlanta’ and ‘Yorktown’ left Boston December 7, 1889, for Lisbon, Portugal. The first three arrived at Lisbon on December 21st without having touched at any port en route. The ‘Yorktown’ arrived at that port December 23d, having, stopped about twenty-four hours at Fayal, Azores.... Influenza first appeared on the ‘Chicago’ December 23d, on the ‘Boston’ December 28th, on the ‘Atlanta’ December 30th and on the ‘Yorktown’ December 28th.
“Influenza was prevailing in Lisbon at the date of arrival of the squadron.”
In March, 1920, the author was notified of a somewhat similar story which he undertook to trace. The results show well the inaccuracy of verbal transmission through several individuals. A letter was first sent to the Quarantine Officer at Portland, Maine: “It has been reported to us that in a lighthouse just outside of Portland, Maine, there has been a rather interesting prank played by influenza. We are told that three men and one woman live in the lighthouse; that during the 1918 influenza epidemic the woman contracted the disease while none of the men became sick, and that in the present epidemic all three of the men became sick with the disease and the woman remained well. It was claimed that they had had no communication with the mainland for some time before the men became ill,” etc.
The reply was as follows: “I have inquired of the Light House Inspector’s office in Portland and they know of no stations to which the terms of your inquiry would apply.
“At the Boon Island station, there are three keepers with families. At the Half Way Rock station, there are three keepers but no woman. The Inspector does not seem to know of any station where there are three men and one woman.”
A second letter, sent to the Inspector of Lighthouses at Portland brought corroborative information:
“The Boon Island Light Station was stricken by this epidemic in the following manner: The keeper, his wife and five children were all stricken, the keeper himself having had the hardest battle, having apparently been subject to same while ashore in Portsmouth, N. H. after provisions, supplies, etc. The 2d assistant’s wife and two children were also stricken, but the 2d assistant, himself, and the 1st assistant keeper did not contract the malady in spite of the fact that they were all confined on a small island working together at the station.