A Deadly Sweat in Tudor England
In 1485, as England braced for the Battle of Bosworth Field, another, more insidious threat stalked the population: the so-called sweating sickness. It struck without warning, bringing sudden fever and drenching sweats, and could kill within hours. Centuries later, its true identity remains one of medicine’s great puzzles.
A Modern Suspect: Hantavirus
Some scientists have proposed a bold theory: that sweating sickness might have been an early manifestation of hantavirus pulmonary syndrome (HPS). HPS is a modern clinical entity, officially recognized only in 1993 after a deadly outbreak in the Four Corners region of the United States, but its symptoms — fever, followed by rapid respiratory collapse — echo some historical accounts of the Tudor-era disease.
Hantaviruses are certainly old enough to be suspects. Chinese texts from the 12th century describe illnesses with features resembling hantavirus infection, and there is evidence that similar diseases have surfaced repeatedly across history.
Symptoms That Overlap
HPS begins with fever, malaise, and muscle aches, and then, in its catastrophic phase, overwhelms the lungs with fluid, leading to shortness of breath, cough, and cardiovascular shock. Sweating sickness was likewise renowned for its explosive onset and high mortality.
Some researchers see in this overlap a compelling match: a viral disease that attacks rapidly, kills many, and then disappears, only to flare again in outbreaks.
The Transmission Problem
But there is a serious challenge to the hantavirus hypothesis: transmission. Historical records of sweating sickness often describe it as spreading from person to person, moving quickly through households and communities.
For most known hantaviruses, this does not fit. Nearly all are not contagious between humans, spreading instead from rodent excreta to humans. Only the Andes virus has been confirmed to pass between people, and even then, such events are rare and limited.
This mismatch has fueled criticism of the hantavirus theory. If sweating sickness really moved readily from one person to another, it would not resemble any hantavirus outbreak we have documented in modern times.
Echoes in the Trenches and Beyond
The idea that hantaviruses have shadowed human history is not confined to Tudor England. Trench nephritis — a kidney disease that affected soldiers in World War I — may also have been caused by hantavirus infection. Later, in 1931, physicians in Northeast China documented what is recognized as the first modern clinical description of hantavirus infection, and around the same time, Sweden identified nephropathia epidemica.
A Mystery That Illuminates Today
Whether sweating sickness was truly hantavirus may never be settled. But the debate itself highlights an important truth: emerging diseases are often old foes in new guises. As we unravel the history of hantaviruses — from medieval plagues to modern outbreaks — we see how easily a rodent-borne virus can be mistaken for something entirely new when it first erupts into view.