Open Questions

Open Bloodletting

Why It Is Open Bloodletting appears independently in ancient Egyptian, Mesopotamian and Greek sources with no single first documented instance; unlike cataract surgery (dated to Daviel, 1750) or vaccination (dated to Jenner, 1796), it has no founding event to anchor an origin year.

What Would Settle It A dated papyrus, cuneiform tablet or other primary source establishing the earliest attested instance of deliberate therapeutic blood withdrawal, or a specialist historical consensus that no such instance can be recovered.

Expertise Needed Medical History

Question posed in The Greatest Benefit to Mankind: A Medical History of Humanity, Roy Porter, Ch. 1, ancient medicine.

Open Cataracts

Why It Is Open Indian tradition credits the physician Sushruta with the earliest description of couching, but neither the authorship nor the exact date of the underlying Sushruta Samhita can be established with certainty; the earliest surviving explicit Greek written account is attributed to the philosopher Chrysippus of Soli (circa 279 to 206 BCE). A modern historical review concludes it is impossible to say which nation, or which individual, first performed a cataract operation.

What Would Settle It A securely dated manuscript or archaeological find fixing the Sushruta Samhita composition to a specific era relative to Chrysippus, or a specialist historiographical consensus resolving the priority question.

Expertise Needed Medical History

Question posed in Annals of Translational Medicine: The History of Cataract Surgery, The origin of cataract surgery.

Open Trepanation

Why It Is Open Proposed medical purposes include treating head wounds, skull fractures, epilepsy and hydrocephalus; proposed spiritual purposes include releasing evil spirits believed to cause illness and producing bone-fragment talismans. Neither explanation can be confirmed or ruled out from skeletal evidence alone, and the two purposes are not mutually exclusive across the many independent cultures (Neolithic Europe, ancient China, pre-Columbian Peru and Mesoamerica, East Africa) that practiced trepanation. A widely repeated claim that it treated headaches has no credible supporting evidence and traces to a 1913 misreading by the physician William Osler of the anthropologist Paul Broca's earlier writing.

What Would Settle It Direct textual or iconographic evidence from a trepanning culture stating its own purpose, or a rigorous cross-cultural study correlating trephination sites with skeletal trauma versus other markers, at a scale sufficient to separate medical from ritual practice.

Expertise Needed Archaeology and Medical Anthropology

Question posed in Wikipedia: Trepanning, Historical Purposes (Disputed).

Open Cataract Surgery

Why It Is Open Couching, the ancient practice of displacing a clouded lens with a needle, is widely called history's oldest surgical procedure, and popular and even some specialist ophthalmology literature attributes an early description to the ancient Indian text the Sushruta Samhita. Ophthalmic historian Julius Hirschberg traced this claim and found it repeated from paper to paper without verification against the original sources, concluding the attribution can be neither confirmed nor denied. No confirmed date or place of origin for couching exists in the scholarship consulted for this atlas.

What Would Settle It A philological history of ophthalmology specialist tracing the Sushruta Samhita attribution to its original textual layer, with a defensible date for that layer, or an independent primary source for couching predating or corroborating it.

Expertise Needed History of medicine, Sanskrit philology

Question posed in Wikipedia, Wikipedia contributors.

Open Trepanation

Why It Is Open Trepanned skulls are attested across independent Neolithic and Mesolithic sites worldwide with no single earliest instance; unlike cataract surgery (Daviel, 1750) or vaccination (Jenner, 1796), the practice predates writing entirely and has no founding event to anchor an origin year.

What Would Settle It Confirmed osteological dating of the earliest known trepanned skull, or a specialist paleopathology consensus on the practice's deepest attested horizon.

Expertise Needed Paleopathology

Question posed in Wikipedia: Trepanning.

Open Development of the Polio Vaccine

Why It Is Open The oral vaccine is cheaper, easier to administer and induces stronger intestinal immunity that blocks transmission, which made it the workhorse of the global eradication campaign; but its live virus can, rarely, revert to a form that causes circulating vaccine-derived poliovirus (cVDPV) outbreaks, 721 cases of which were reported worldwide between January 2005 and May 2016, 94 percent of them from the vaccine's own type 2 component. The injected inactivated vaccine carries no such reversion risk but is costlier, requires trained staff to administer, and confers weaker intestinal immunity. The World Health Organization coordinated a global, synchronized switch from trivalent to bivalent oral vaccine in April 2016 specifically to retire the type 2 oral component, introducing injected vaccine into routine schedules worldwide to cover the resulting gap, a policy tradeoff public health authorities continue to weigh as wild poliovirus nears eradication in the remaining endemic countries.

What Would Settle It Sustained, verified interruption of all wild and vaccine-derived poliovirus transmission worldwide following a specific vaccine strategy, or a WHO Strategic Advisory Group of Experts consensus settling the remaining oral-to-inactivated transition timeline.

Expertise Needed Public Health and Epidemiology

Question posed in CDC MMWR: Introduction of Inactivated Poliovirus Vaccine and Switch from Trivalent to Bivalent Oral Poliovirus Vaccine, The Debate and Mitigation Strategy.