The plague scare: What if we call it “just the flu”?

Taylor Swift has a song called “Patient Zero.” A laboratory worker at a Russian plague research institute has died.

And boom! A ready-made conspiracy theory.

Until you check the evidence.

“Patient Zero” was announced for release on September 25. The laboratory worker reportedly died October 2, so the claim that the release coincided with her death does not hold up. Other claims link the song to an alleged September 25 laboratory exposure—but that incident remains unconfirmed. Neither version establishes a connection between Swift’s music and the woman’s illness.

But against a recent rise in reported flu-like illnesses in the Philippines, a plague scare can feel less distant—especially when you are already feeling sick.

I’m writing this earlier than my usual weekend analysis because I’m currently dealing with flu-like symptoms myself. If you are reading this between coughing fits or while waiting for a fever to settle, you may understand why the story caught my attention.

Feeling vulnerable, however, does not make two illnesses connected. My symptoms are not evidence of plague, and the Russian worker’s death has not been confirmed as a plague case.

For me, the more useful question is this:

Would we recognize a dangerous infection—or dismiss it as another case of flu?

Russian media identified the woman as Darya Shipilova, 28, an employee of the Irkutsk Anti-Plague Research Institute. Reuters reported that she died October 2 from pneumonia of undetermined origin, prompting authorities to quarantine about 200 people. A connection to her work had not been established.

At its October 6 briefing, the World Health Organization said no cause of death had been confirmed; Russian authorities reported negative contact tests for dangerous infectious pathogens. The European Centre for Disease Prevention and Control reported no secondary cases or sustained human-to-human transmission. An unexplained death is not a confirmed outbreak.

According to the Russian account relayed by WHO, her illness initially resembled a typical acute respiratory viral infection. That reinforces the need for reassessment, without establishing that delayed recognition caused her death.

After COVID-19, an unexplained laboratory worker’s death understandably attracts scrutiny. A workplace accident warrants investigation; a deliberate release or cover-up requires its own evidence. The public deserves findings, not speculation presented as fact.

A serious danger is the time lost before an infection is recognized.

Plague is caused by the bacterium Yersinia pestis, which persists in animal reservoirs involving small mammals and fleas. Bubonic plague affects lymph nodes, septicemic plague involves the bloodstream, and pneumonic plague infects the lungs—either when infection spreads there from elsewhere in the body or through inhalation of infectious droplets.

After inhalation exposure, symptoms commonly begin within one to three days. Pneumonic plague can produce rapidly worsening pneumonia, chest pain, breathlessness and sometimes bloody sputum.

During my ASPN interview with infectious diseases specialist Dr. Rontgene Solante, our discussion focused on how quickly pneumonic plague can worsen. The broadcast highlighted a warning of deterioration within 24 to 48 hours—a reminder of why timely recognition matters.

Untreated pneumonic plague can be rapidly fatal, but prompt antibiotics can save lives. The US Centers for Disease Control and Prevention advises treatment without waiting for diagnostic confirmation when plague is suspected.

That does not make every fever a plague case. Clinical judgment must connect symptoms, exposures and deterioration. A reassuring first impression must be revisited when the patient gets worse.

Severity does not mean easy transmission. ECDC says spread generally requires close, prolonged contact with an infected person already showing symptoms.

For the Philippines, an imported infection is a possible scenario: someone exposed abroad could fall ill during travel or after arrival. Establishing a case would require exposure histories, compatible illness and diagnostic evidence, followed by investigation of close contacts.

Here at home, the numbers deserve attention—but a rise in reported flu-like illnesses does not establish that plague has arrived.

DOH figures showed 99,037 influenza-like illness cases from January 4 to September 19, compared with 127,148 during the corresponding period last year—a 22 percent decrease.

But the shorter-term trend rose: 7,427 cases from August 23 to September 5, compared with 6,334 from August 9 to 22, an increase of about 17 percent.

Both figures belong in the story. A recent increase and a lower annual total can coexist. Those reporting periods also precede the Russian worker’s October 2 death.

More fundamentally, “influenza-like illness” describes a pattern of symptoms used in surveillance. It does not identify a single pathogen. WHO explains that influenza cannot easily be distinguished from other respiratory infections through symptoms alone.

Counting cases reveals trends. Investigating unusual severity, exposures and clusters helps explain them.

Hospitals need procedures for investigating unusual pneumonia, testing, notifying authorities, protecting contacts and treating promptly when warranted. The DOH, Bureau of Quarantine and hospitals should explain those arrangements before an emergency tests them.

Russia, meanwhile, owes the public a clear account of its investigation. Reassurance carries more weight when people can examine the evidence behind it.

Lest we forget, the lesson of an unexplained death is not that every fever heralds a catastrophic outbreak. It is that public health systems cannot afford complacency. A frightened public can mistake coincidence for evidence. A health system can make a dangerous mistake of its own when familiarity becomes an excuse to stop asking questions.

We do not yet know what killed the laboratory worker in Russia. But the uncertainty should make us examine how quickly we would investigate an unusual illness here.

“Just the flu” may be a reasonable first impression. The danger begins when it becomes the last question anyone asks.