Penicillin was discovered in 1928. Before that date, a simple wound infection, an untreated tooth abscess, or a case of strep throat could kill a person. Pneumonia was called the old man’s friend because it ended so many lives that had been weakened by age. Childbirth fever killed women in maternity wards at rates that seem horrifying today.
And yet, humanity survived and built civilizations for thousands of years without a single antibiotic. How? The answer involves plant medicine, practical hygiene, dietary knowledge, wound care techniques, and a great deal of careful observation passed down through generations. Some of it was effective. Some of it was superstition. But a surprising amount of what people used before 1928 has since been validated by modern research.
This is that history.
The Scale of the Problem Before Antibiotics
To understand what people used, you first have to understand what they were up against. According to the Centers for Disease Control and Prevention (CDC), bacterial infections were among the leading causes of death in the United States as recently as the early twentieth century. Tuberculosis, pneumonia, scarlet fever, typhoid, diphtheria, and sepsis from infected wounds routinely killed people of all ages.
Average life expectancy in the United States in 1900 was approximately 47 years, compared to 78 today. A significant portion of that gap is attributable to infectious disease. Children were especially vulnerable. Infant mortality was extraordinarily high, largely from intestinal infections that modern antibiotics and clean water infrastructure have made rare.
The question of what people did before antibiotics is not an academic one. It is a question about how large populations managed illness with the tools they had, and in many cases, those tools were more effective than we give them credit for.
Plant Medicine: The Foundation of Pre-Modern Treatment
Every culture on earth developed a tradition of medicinal plant use. The specific plants differed by geography, but the underlying practice was universal: certain plants reliably helped with certain conditions, and this knowledge was accumulated, tested, and passed down over generations.
The Ebers Papyrus, an Egyptian medical document dating to approximately 1550 BCE, lists hundreds of herbal preparations for conditions we would now recognize as bacterial infections. Garlic appears prominently. Honey is listed as a wound dressing. Willow bark, which contains salicin, a precursor to aspirin, was used for fever and pain.
In medieval Europe, herbalists and apothecaries maintained extensive knowledge of antimicrobial plants. Thyme, oregano, sage, and rosemary were used not only in food but as medicinal preparations for respiratory and wound infections. Garlic was applied to wounds during World War I by British military doctors when conventional antiseptics ran short, with documented success in reducing infection rates.
Some of these plants have since been found to contain compounds with genuine antimicrobial activity. Allicin in garlic, carvacrol in oregano, thymol in thyme, and berberine in goldenseal have all been studied in modern laboratory settings and shown to inhibit bacterial growth. The people who used these plants before modern science did not know why they worked. They knew that they did, and they built that knowledge into their medical traditions.
For a detailed look at one of the most studied of these traditional antimicrobial plants, the resource on offers a thorough breakdown of how certain herbs were used historically as broad-spectrum infection fighters and what the current research says about their mechanisms.
Wound Care Before Antibiotics
Wound infection was one of the most immediate threats in the pre-antibiotic era. A cut, a puncture from a farming tool, or a surgical incision could lead to sepsis and death within days if not managed correctly. Pre-modern wound care was more sophisticated than its reputation suggests.
Honey as a Wound Dressing
Raw honey was applied to wounds across ancient Egyptian, Greek, Roman, and Ayurvedic medical traditions. Modern research has confirmed why: honey has a low water content that dehydrates bacteria, produces hydrogen peroxide through enzymatic activity, and in some varieties contains additional antimicrobial compounds like methylglyoxal. Manuka honey is now used in clinical wound care settings in some countries and is listed in several national formularies.
Mold Preparations
The story of Alexander Fleming discovering penicillin from mold contamination of a petri dish is famous. Less known is that folk medicine traditions in multiple cultures, including Serbian, Irish, and Eastern European communities, had long applied bread mold directly to infected wounds. They did not know about penicillin, but they had empirically observed that moldy bread helped wounds heal. This is a striking example of folk observation anticipating scientific discovery by centuries.
Vinegar and Wine
Both vinegar and wine were used as wound rinses and antiseptics throughout antiquity. The acetic acid in vinegar creates an acidic environment hostile to many bacteria. Hippocrates recommended vinegar for wound cleaning in the fifth century BCE. During the American Civil War, vinegar was used to disinfect surgical instruments when nothing else was available.
Maggot Therapy
One of the oldest and most effective wound treatments was the deliberate use of maggots from certain blowfly species to clean necrotic tissue from wounds. Military surgeons in the Napoleonic Wars observed that soldiers whose wounds had become infested with maggots healed better than those without infestation. Maggot therapy is still used in modern medicine for wounds that resist other treatments, having received FDA clearance in the United States in 2004.
Fever Management Without Antibiotics
Fever was both a symptom to be treated and, as we now understand, a defense mechanism the body uses to fight infection. Pre-modern approaches to fever were a mix of genuine physiological insight and ritual.
Willow bark tea was one of the most widely used fever treatments in European folk medicine, and for good reason. The salicin it contains is metabolized by the body into salicylate, which has antipyretic and anti-inflammatory properties. It is, essentially, a cruder form of aspirin. The National Institutes of Health has published research confirming the anti-inflammatory mechanisms of salicin-containing plant preparations.
Elderberry (Sambucus nigra) was used throughout Europe for respiratory infections and fevers. Modern research has identified flavonoids in elderberry that appear to inhibit viral replication and support immune function. Echinacea was used by North American indigenous peoples for fevers and infections long before European settlers encountered the plant.
Cool water bathing was also a standard fever treatment. While some early practices involved dangerous treatments like covering patients in heavy blankets to induce sweating, many folk traditions correctly identified that cooling the body helped manage dangerous high temperatures.
Dietary Approaches to Infection
Pre-modern medicine understood at an intuitive level that what a person ate affected their ability to fight illness. Broth made from boiled bones and meat was universally used across cultures as both a restorative for the sick and a treatment for respiratory illness. Modern research has identified that chicken broth in particular contains compounds that mildly inhibit neutrophil migration, which may reduce some symptoms of upper respiratory infection.
Fermented foods, including yogurt, kefir, sauerkraut, kimchi, and kvass, were staples of traditional diets in many cultures. The beneficial bacteria they contain support gut health, and since a large proportion of the immune system is gut-associated, this dietary pattern likely contributed to disease resistance in ways that practitioners of the time understood only in terms of general vitality.
Fasting during illness was also common. Modern research on this practice suggests it may have some basis: short-term fasting has been shown to trigger autophagy and certain immune responses that may help clear infection.
Quarantine and Hygiene
Some of the most effective pre-antibiotic infection control was not plant-based at all. Quarantine as a concept dates at least to the fourteenth century, when the city of Ragusa (modern Dubrovnik) required arriving ships to wait thirty days before passengers could disembark during plague periods. The period was later extended to forty days, giving us the word quarantine from the Italian quaranta giorni.
Hand washing as a medical intervention was championed by the Hungarian physician Ignaz Semmelweis in the 1840s, who noticed that childbed fever death rates dropped dramatically when doctors washed their hands with chlorinated lime solution before delivering babies. He was largely ridiculed by contemporaries. He was also correct.
Isolation of the sick, ventilation of sickrooms, boiling of water, and avoidance of contaminated food and water were all understood as protective measures by various cultures at various times, even without germ theory to explain why they worked.
What This History Tells Us
The pre-antibiotic era was brutal in many ways. Infections that are now routine to treat killed large proportions of the population. Childhood mortality was staggering. Surgical survival rates were poor.
But the era also produced a deep, empirically derived body of knowledge about which plants and practices helped, which ones did not, and how to manage illness with what was available. That knowledge did not disappear when penicillin arrived. It was recorded, studied, and in many cases validated.
Understanding what people used before antibiotics is useful not as nostalgia but as preparation. Supply chains fail. Access to medical care is not universal. And antimicrobial resistance is slowly eroding the effectiveness of the pharmaceutical tools we have come to depend on. The plants and practices that kept people alive for centuries are worth knowing about.