The Protocol of Normalcy (Mid‑September 1918)

The finding was definitive in scientific terms. On that morning, it was also irrelevant to public policy.

Wilmer Krusen read Paul Lewis’s laboratory report without lifting his pen from the day’s correspondence. The filterable nature of the causative agent—Lewis’s careful phrasing—meant the pathogen passed through porcelain barriers that stopped bacteria. It meant influenza was a virus, invisible, unculturable on ordinary media, beyond the reach of serum therapy and the antiseptic protocols that had governed public health for a generation. Lewis had typed his findings on September 14, 1918, the same day the Navy Yard reported twenty new admissions to its isolation ward. Krusen filed the report in a wooden cabinet marked “Research—Current” and turned to the letter on his desk from the Fourth Federal Reserve District.

The letter requested his attendance at a meeting concerning the Fourth Liberty Loan drive. Philadelphia’s quota was $259 million, the largest of any American city. The loan chairman noted that the campaign would culminate in a parade on September 28, a “monster demonstration” to stir patriotic subscription. The Fourth Liberty Loan, authorized by Congress on September 24, 1918, offered $6.9 billion in bonds at 4.25 percent. The letter did not mention influenza. Krusen wrote his acceptance in the margin and rang for his clerk.

The clerk entered with the weekly mortality returns. He read the figures aloud in the flat voice of a man reading a timetable. Deaths from all causes: 485 for the week ending September 14, within the seasonal average. Deaths from pneumonia and influenza: 47, up from 31 the previous week. The clerk paused. Krusen asked for the Navy Yard figures again. The clerk read them: 600 cases under treatment, 20 deaths since September 12. The Bureau of Health minutes for that afternoon recorded that the situation at the Naval Hospital was reported as well in hand. The minutes did not record what Krusen knew from Lewis’s private memorandum: that the pathogen had already escaped the base perimeter, that two civilian cases with no naval contact had appeared in South Philadelphia, that the incubation period made any containment temporary at best.

Krusen dictated a public bulletin before leaving for his Liberty Loan meeting. The disease was now present in epidemic form at the naval stations, it stated, but was not prevalent in the civilian population. Technically accurate. In its selection of facts, a choice.

The meeting convened at 4:00 PM in the directors’ room of the Girard Trust Company. Twelve men sat around a mahogany table: bankers, manufacturers, the publisher of the Public Ledger, and the chairman of the Mayor’s Committee of Public Safety. The Liberty Loan campaign had already distributed nine million posters, five million window stickers, ten million buttons. The September 28 parade would feature floats, marching bands, military detachments, and a speaking platform at Broad and Chestnut where the governor and the mayor would address the crowd. City officials projected the parade would draw only around 10, 000 spectators. The chairman asked Krusen directly whether there was any medical reason to postpone.

Krusen’s reply survives only in the meeting’s unofficial record, preserved in the papers of the loan committee’s secretary. He stated that the disease was confined to the naval stations, that ordinary precautions would suffice, and that nothing should be done to interfere with the success of the loan. The secretary noted that Krusen spoke with confidence. The committee voted unanimously to proceed.

The protocol of normalcy in operation: not a written policy but a practiced reflex, a hierarchy of values in which civic order and patriotic duty occupied the summit that preventive disruption might otherwise claim.

Krusen was not a negligent man. He had trained in Berlin and Vienna, had directed the Philadelphia General Hospital’s surgical service, had accepted the health directorship in 1916 with a mandate to modernize the city’s antiquated sanitary infrastructure. But he had accepted it during wartime, and the war had reshaped the possible.

The federal government’s influenza bulletins, arriving weekly from Surgeon General Rupert Blue’s office, emphasized prevention of panic as a primary objective. The Council of National Defense had warned that alarmist reports could damage morale and production. Krusen’s own annual reports celebrated the city’s low absenteeism rates, its uninterrupted shipyard output, its successful management of the 1916 polio outbreak without closing schools or businesses. The precedents were clear. The costs were not yet visible.

The week of September 15-21 brought the first test of this calculus. On Monday, September 16, the Navy Yard reported 1, 500 cases. The hospital, built for 1, 200 beds, began converting corridors and mess halls to wards. Lewis, working in his improvised laboratory, sent Krusen a second memorandum: the pathogen’s virulence in experimental animals suggested unusual severity in human populations. Krusen filed it without public comment. On Tuesday, the Bureau of Health minutes recorded some increase in civilian cases, attributed to contact with naval personnel. On Wednesday, Krusen issued Bulletin No. 2. The public was urged to avoid crowding and to practice personal cleanliness. No closures were ordered. No gathering was prohibited.

The pressure on Krusen ran in three channels, and the records of each survive. From Washington, Surgeon General Blue’s office sent telegrams requesting full cooperation with the Liberty Loan campaign and warning against undue interference with business. From the business interests themselves—documented in the correspondence files of the Philadelphia Chamber of Commerce—came specific objections to any measure that might create panic or disrupt commerce. From Lewis and the medical staff at the Navy Yard came increasingly urgent private communications. Lewis’s September 18 letter to Krusen, preserved in the University of Pennsylvania archives, noted that the disease was now spreading with remarkable rapidity and that the mortality among young adults was unexpectedly high. He recommended immediate and stringent measures of isolation. Krusen’s reply, if any, does not survive.

The protocol operated through omission as much as commission. When the Board of Health met on September 19, the minutes recorded discussion of routine matters and approval of plumbing permits. The influenza situation was noted. No vote was taken. The board’s authority to close public places, established by the 1905 state health law, remained dormant. Krusen later testified that he had deemed it inadvisable to invoke these powers, citing the need to avoid unnecessary alarm. The test of this judgment was already accumulating in the city’s death registers.

September 19 marked the formal arrival of Spanish influenza in Philadelphia’s civilian population. The first confirmed case, in the records of the Bureau of Health, was a dockworker at Hog Island, the massive shipyard south of the city. He had no known contact with naval personnel. By evening, three more cases appeared in South Philadelphia, two in Kensington, one in Germantown. The geographic scatter suggested what Lewis’s laboratory had already indicated: the virus was airborne, mobile, indifferent to quarantine lines drawn on maps. Krusen received these reports at his desk on Friday morning, September 20. He was scheduled to speak that evening at a Liberty Loan rally at the Metropolitan Opera House.

He spoke as planned. The Evening Public Ledger reported his remarks on Saturday morning: There is no cause for alarm. The situation is well in hand. The newspaper did not report what Krusen knew when he stepped to the podium: that the Navy Yard had recorded forty deaths in the past forty-eight hours, that the civilian case count had doubled overnight, that Lewis had begun preparing lung tissue samples for shipment to the Army Medical Museum because local burial facilities were approaching capacity. The confidence loop was already spinning. Official optimism suppressed the circulation of alarming facts; the absence of alarming facts made optimism seem justified; the gap between reported and actual conditions widened until it became unbridgeable.

The weekend of September 21-22 brought the first visible strain on the city’s institutional fabric. At the Philadelphia General Hospital, the medical superintendent reported that influenza admissions had exceeded the available isolation space. At the Pennsylvania Hospital, nurses were recalled from leave. At St. Agnes Hospital in South Philadelphia, the administrator sent an urgent request to the Bureau of Health for additional staff; the request was filed without action. The hospitals were not yet overwhelmed. They were, however, operating at the margin of their designed capacity, with no reserve for the exponential curve that Lewis’s animal experiments had predicted.

Krusen spent Monday, September 23, in a series of meetings that the records allow us to reconstruct. At 9:00 AM, he received a delegation from the Retail Merchants’ Association, who expressed concern that rumors of epidemic were depressing trade. At 11:00 AM, he conferred with the superintendent of schools, who reported absenteeism rates of 10 percent in several South Philadelphia schools but requested no closure order. At 2:00 PM, he met with Lewis and two Navy medical officers at the Navy Yard. The meeting’s purpose, noted in Lewis’s diary, was to coordinate civilian and military response. The coordination achieved was minimal. The Navy officers requested that civilian health authorities take responsibility for cases among naval workers who lived off-base. Krusen agreed. The Navy, in return, agreed to continue its own quarantine of base personnel—a quarantine already porous, as the dockworker cases demonstrated.

The Bureau of Health minutes for September 23, recorded the following morning, contain a single sentence on influenza: The Director reported satisfactory progress in handling the present situation. The minutes devoted three pages to the milk inspection program and the proposed new garbage incinerator at Twenty-sixth and Penrose.

Not simple denial. A system functioning as designed. The city’s public health apparatus had been built for a different scale of threat: typhoid from contaminated water, tuberculosis in tenement districts, smallpox in immigrant populations. These were manageable through the techniques of progressive sanitation—inspection, education, targeted intervention. They were visible, traceable, responsive to the methods that Krusen had learned in Berlin. The 1918 influenza was invisible, untraceable, indifferent to progressive methods. The apparatus, confronted with this mismatch, defaulted to its accustomed posture: measurement, reassurance, maintenance of normal operations. The alternative—closure, quarantine, the deliberate disruption of economic and social life—lay outside the repertoire of acceptable action. It would require acknowledging that the progressive state had met its limit, that the war effort itself might be the vector of disease, that the protocol of normalcy was not a neutral procedure but a political choice with distributional consequences.

The distributional consequences were already appearing in the mortality returns. For the week ending September 21, deaths from pneumonia and influenza totaled 118, up from 47 the previous week. The increase was concentrated in the river wards—Southwark, Moyamensing, Kensington—where naval workers and their families lived in the dense housing that the city’s reformers had been trying to improve for two decades. The geography of death matched the geography of industrial employment. The protocol of normalcy, presented as a universal measure of civic stability, was already selecting its victims.

September 24-26 brought the final escalation before the parade. On Tuesday the 24th, Krusen issued Bulletin No. 3, his longest public statement to date. It acknowledged that influenza had spread to the civilian population but emphasized that the disease is of a mild type in most cases. It recommended that those ill should remain at home and that crowds should be avoided as far as possible. It did not prohibit crowds. It did not close schools, theaters, churches, or saloons. The Inquirer headlined the bulletin “Influenza Check Is Working,” a characterization that the text did not support but that Krusen did not correct.

On Wednesday the 25th, the Mayor’s Committee of Public Safety met to review final arrangements for the September 28 parade. The committee’s minutes record a communication from the Director of Public Health stating that no change in plans is recommended. The committee voted to proceed with the monster demonstration. That evening, Krusen received a telegram from Surgeon General Blue, forwarded through the regional Public Health Service office. Blue’s message, preserved in the National Archives, noted epidemic conditions in multiple eastern cities and suggested that gatherings of large numbers may facilitate transmission. The suggestion was not an order. Krusen filed it with Lewis’s memoranda.

On Thursday the 26th, the Bureau of Health staff compiled the preliminary mortality returns for the week ending September 28. The clerk read the figures aloud in Krusen’s office. Total deaths from all causes: 589, up from 485 two weeks earlier. Deaths from pneumonia and influenza: 254, a fivefold increase from the September 14 figure. The clerk paused at the Navy Yard column: 86 deaths since Monday, 33 in the previous twenty-four hours. The hospital was now using a converted garage for overflow cases. Lewis had stopped sending memoranda and begun sleeping at the laboratory.

Krusen asked for the civilian projection. The clerk had prepared it: at current rates, 400-500 civilian deaths expected in the coming week, with considerable uncertainty due to reporting delays. The clerk noted that these figures would not be final until after the weekend. Krusen asked when the next bulletin was due. Friday morning, the clerk replied. Krusen directed that Bulletin No. 4 should state that the situation is improving and that the peak of the epidemic has passed. The clerk recorded the directive in his notes. The notes do not record any discussion of the parade.

The protocol of normalcy had reached its terminal phase. The gap between official statement and observable reality, manageable when measured in dozens of cases, now yawned across hundreds of deaths. The institutions designed to process information and authorize response were committed to a course that their own data contradicted. Krusen was not the architect of this system but its operator, executing a program written elsewhere—in the war’s demand for uninterrupted production, in the progressive faith that competent administration could manage any crisis, in the class-bound assumption that economic disruption harmed the public more than disease killed the poor. His choices were choices. They were also, by September 26, the only choices the system permitted.

The evening of September 26 brought one final intersection of the three pressure channels. At 7:00 PM, Krusen attended a Liberty Loan organizers’ meeting at the Bellevue-Stratford Hotel. The chairman reviewed the parade route: Broad Street from Oregon Avenue to Girard, two miles of marching bands and patriotic floats. Expected attendance: 200, 000. The governor would speak. The mayor would speak. A young woman dressed as Liberty would ride the lead float, distributing subscription blanks. The chairman asked Krusen for a final medical assessment.

Krusen’s reply survives in the testimony of a loan committee member, recorded months later in the city council’s epidemic investigation. Krusen stated that he saw no reason why the parade should not go forward. He added, according to the witness, that the value of the demonstration in stimulating the loan subscriptions outweighs any slight risk of spreading the disease. The committee applauded. The minutes were approved. The posters remained on the walls.

September 27, 1918, was a day of final preparations and suppressed knowledge. The Bureau of Health staff worked through the morning on the weekly mortality report, reconciling hospital admissions with death certificates, adjusting the civilian count for the lag in neighborhood reporting. The preliminary total for the week stood at 289 influenza and pneumonia deaths, with Saturday’s figures still incomplete. The clerk projected a final count near 350. This would be the highest weekly mortality from these causes in Philadelphia’s recorded history, exceeding even the peak weeks of the 1892 influenza outbreak. The clerk prepared the tables for Krusen’s review.

Krusen spent the morning at the Navy Yard, his first visit since Monday. Lewis met him at the laboratory entrance. The scene that followed is reconstructed from Lewis’s diary and the testimony of a Navy medical officer who observed part of the exchange. Lewis reported that the pathogen’s virulence had not diminished in serial passage through animals. He reported that post-mortem examinations showed massive pulmonary hemorrhage in fatal cases, a pathology that explained the rapid death of previously healthy young adults. He reported that the civilian case count, by his informal tally, exceeded the official Bureau of Health figures by a factor of three. He concluded, according to his diary, that the parade would be a death sentence for many who attend.

Krusen’s response, as recorded by the Navy officer, was to ask whether Lewis’s informal tally could be documented for official use. Lewis replied that his staff was entirely occupied with clinical and laboratory duties. Krusen then asked whether the Navy would consider postponing its participation in the parade. The Navy officer, consulted by Krusen directly, replied that such a decision would require approval from the Bureau of Navigation in Washington. The approval could not be obtained in twenty-four hours. The Navy would march.

Krusen returned to his office at 3:00 PM. The clerk presented the mortality tables. Krusen reviewed them without comment and directed that the weekly report should be released on Monday, September 30, after the parade. He then drafted Bulletin No. 4, to be published in the morning papers. The present epidemic of influenza, it read, is now well under control. The death rate has been reduced and the disease is decreasing in severity. False in every particular. Also, in the logic of the protocol, necessary: a statement of the desired condition that might, through the confidence it generated, help produce the condition itself.

The bulletin went to press at 6:00 PM. At 7:00 PM, Krusen attended a final meeting with the Mayor’s Committee. The parade route was confirmed. The speaking order was confirmed. The health director’s medical clearance was confirmed. The meeting adjourned at 8:30 PM. Krusen walked to his car through streets already filling with early arrivals for the morning’s demonstration. The streetcars were running on time. The theaters were open. The saloons were crowded with Liberty Loan volunteers receiving their final instructions. The city presented the appearance that the protocol was designed to produce: normalcy, continuity, confidence in the face of war.

The official mortality returns for Philadelphia for the week ending September 28, 1918, recorded 289 deaths from influenza and pneumonia, a figure that would be revised upward to 347 when late reports were consolidated. This was the quantifiable cost of the protocol, measured against the public assurance that the epidemic was well under control. The parade would proceed in the morning. The virus would proceed with it. The convergence of these two movements—one ceremonial, one invisible, both unstoppable—would transform a local outbreak into a civic catastrophe. The records were complete. The choice was made. The only remaining variable was the speed at which the consequences would arrive.