The campaign against diphtheria in Cork Street Fever Hospital, 1934-1952
Harriet Wheelock

The campaign against diphtheria in Cork Street Fever Hospital, 1934-1952

Leaflet promoting a diphtheria immunisation scheme,
collected by Dr McSweeney (CSFH/3/1/4/5)

In 1934, Dr CJ McSweeney became Medical Superintendent of Cork Street Fever Hospital, Dublin, a position he retained until his death in 1953. Dr McSweeney, who had previously worked in the City Isolation Hospital in Cardiff, came to a city with a large slum population and a high incidence of infectious fevers.[1] A progressive physician who was a strong proponent of preventative measures and use of therapeutic aids, Dr McSweeney devoted much time in the first decade in Cork Street to the fight against diphtheria of the ‘gravis’ type, which claimed the lives of thousands of children in Dublin in the early twentieth century.

Diphtheria in Cork Street, 1934-1946

Dr McSweeney’s annual medical reports, which form part of the Cork Street Fever Hospital archive held in the Royal College of Physicians of Ireland, are excellent sources which show diphtheria admission and mortality statistics in the hospital. In the years following Dr McSweeney’s appointment, diphtheria accounted for a large proportion of patient admissions to the hospital. Dr McSweeney noted in 1934 that the ‘gravis’ type of diphtheria prevailing in Dublin was much more virulent that that occurring in many areas in Ireland and the UK, and case mortality was therefore higher. The following table demonstrates the diphtheria statistics from 1934 to 1946:

Year
Number of patients admitted
Number of patients who died
Case mortality rate
1934
746
70
9.4%
1935
721
59
8.18%
1936
636
80
12.57%
1937
648
59
9.1%
1938
685
61
8.9%
1939
656
46
7%
1940
585
38
6.5%
1941
438
39
8.9%
1942
581
32
5.51%
1943
836
44
5.08%
1944
927
24
2.43%
1945
747
18
2.41%
1946
431
13
3.02%

Although the number of patient admissions remained high during these years, the introduction of a mass immunisation scheme by Dublin Corporation in 1940 resulted in a progressive decline in mortality rates. Many fatal cases involved children under 10 years old who had contracted diphtheria a few days previously. A large proportion of these patients died within 24 hours of admission, a fact that was frequently decried by Dr McSweeney. In the 1943 Medical Report, Dr McSweeney lamented that:

‘These inevitably fatal cases were all victims of the optimistic philosophy which is part of our national character, a frame of mind which expects even mortal illness to become less serious on each successive day’.[2]

Photograph of members of staff and some members of the Managing Committee of Cork Street Fever Hospital, 1935. Dr McSweeney is seated in the second row, sixth from the right (CSFH/1/3/4/1)

Dr McSweeney and the Diphtheria Immunisation Campaign

In the first few years of his time as Medical Superintendent, Dr McSweeney regularly wrote about the need for a mass diphtheria immunisation programme in his annual medical reports. In the 1938 report, he noted that 61 deaths from diphtheria had occurred in the hospital during the year, a figure representing 35% of total mortality. In Dr McSweeney’s view, these deaths were ‘all preventable and in an enlightened community would not occur’. The remedy was ‘immunisation of all children as soon as they attain their first birthday, followed by re-inoculation, if found necessary, before they begin school life’.[3]

Dr McSweeney’s wish became reality in 1940, when the Government introduced a diphtheria immunisation scheme in Dublin in connection with wartime evacuation schemes for children organised by the Department of Defence. However the scheme was not compulsory for all children, and the failure of some parents to have their children inoculated attracted the ire of Dr McSweeney. In 1941 he wrote that ‘it is disheartening in the extreme to realize the indifference which parents display towards the only effective method of coping with this preventable disease’.[4]

The early immunisation schemes were not without their complications, which were recognised by Dr McSweeney a year later in 1942. In his medical report for the year, Dr McSweeney stated that of the 127,000 children inoculated against diphtheria in Dublin during the previous 10 years, approximately 35% had been treated by the ‘one shot’ method now regarded as unreliable. After a period of 5-7 years some children immunised in this way became susceptible again; 137 of 594 patients with diphtheria admitted in Cork Street in 1942 had given a previous history of receiving a full course of diphtheria prophylactic.[5] However, Dr McSweeney noted in the following year’s report that diphtheria rarely killed a child who had had even one course of injections.[6] He continued to be a firm advocate of the immunisation programme, now modified to consist of the administration of two injections of alum precipitated toxoid (APT) or three injections of toxoid antitoxin floccules (TAF).[7]

Although diphtheria admissions remained high between 1942 and 1946, the case fatality rate reduced year on year. In 1943 Dr McSweeney noted that the greater incidence of the disease had been mainly among adolescents and adults, who very rarely died from it. During Dr McSweeney’s years in Cork Street, the vast majority of deaths from diphtheria were in the under-10 age group.
Post Diphtheric Paralysis being treated with the Bragg-Paul Pulsator, Cork Street Fever Hospital, 1935 (CSFH/1/2/1/8)

The Decline of Diphtheria, 1947-1953

In 1947 admissions of patients suffering from diphtheria in Cork Street declined greatly, down to 179 from 431 the year before. There were just 2 deaths from the 179 admissions. Each year from 1948 to 1951 witnessed a progressive reduction in admissions, with no deaths from diphtheria. In 1952 there were no admissions of diphtheritic patients, and in the 1953 medical report there is no mention of diphtheria at all.

Year
Number of patients admitted 
Number of patients who died
Case mortality rate
1947
179
2
1.12%
1948
104
0
-
1949
28
0
-
1950
4
0
-
1951
5
0
-
1952
0
0
-

Dr McSweeney noted in his 1948 report that the year gone by was the first in sixty years in which no death from diphtheria had been recorded in Cork Street. He stated that ‘although immunisation on a large scale has helped to produce this favourable state of things, it must be conceded that the decline in virulence of the causative organism – a cyclical phenomenon – has been a causative factor’. He concluded that ‘it is probable that diphtheria will remain a minor public health problem in this city for several years provided that the present practice of immunisation is maintained’.[8] His conclusions were correct, and the last diphtheria case (and death) in Ireland occurred in 1967.


Fergus Brady,
Project Archivist




[1] CF Warde and CS Breathnach, ‘A State secret: the closely guarded report of a hospital inquiry, Irish Journal of Medical Science (Summer 2003), p. 87.
[2] Dr CJ McSweeney, Cork Street Fever Hospital Medical Report for 1943.
[3] Dr CJ McSweeney, Cork Street Fever Hospital Medical Report for 1938.
[4] Dr CJ McSweeney, Cork Street Fever Hospital Medical Report for 1941.
[5] Dr CJ McSweeney, Cork Street Fever Hospital Medical Report for 1942.
[6] Dr CJ McSweeney, Cork Street Fever Hospital Medical Report for 1943.
[7] Dr CJ McSweeney, Cork Street Fever Hospital Medical Report for 1942.
[8] Dr CJ McSweeney, Cork Street Fever Hospital Medical Report for 1948.