Infographic: History's Deadliest Pandemics – From Antonine Plague to COVID-19

From the Antonine Plague to COVID-19, including the devastating Spanish Flu, discover the major pandemics that have profoundly shaped human history.

Infectious diseases have triggered epidemics and pandemics long before globalization. Primarily spread by viruses or bacteria, these outbreaks have caused massive demographic losses across millennia. Trade routes accelerated their propagation, but advances in virology, bacteriology, and healthcare have reduced their lethality today—though some remain significant threats.

This curated list details key historical pandemics, highlighting their origins (and intermediate hosts where applicable) alongside estimated death tolls, drawn from established research:

• Antonine Plague (165-180; consensus since 2018 identifies it as likely smallpox): 5 million deaths.
• Japanese Smallpox Outbreak (735-737; variola virus): 1 million deaths.
• Plague of Justinian (541-542; Yersinia pestis bacterium via rats/fleas): 30-50 million deaths.
• Black Death (1347-1351; Yersinia pestis bacterium via rats/fleas): 200 million deaths.
• Smallpox in the New World (1520; variola virus): 56 million deaths.
• Great Plague of London (1665; Yersinia pestis bacterium via rats/fleas): 100,000 deaths.
• Italian Plague (1629-1631; Yersinia pestis bacterium via rats/fleas): 1 million deaths.
• Cholera Pandemic (1817-1923; Vibrio cholerae bacterium): 1 million deaths.
• Third Plague Pandemic (1885; Yersinia pestis bacterium via rats/fleas): 12 million deaths (primarily China and India).
• Yellow Fever (late 1800s; virus via mosquitoes): 100,000-150,000 deaths.
• Russian Flu (1889-1890; avian origin): 1 million deaths.
• Spanish Flu (1918-1919; H1N1 virus via pigs): 40-50 million deaths.
• Asian Flu (1957-1958; H2N2 virus): 1.1 million deaths.
• Hong Kong Flu (1968-1970; H3N2 virus): 1 million deaths.
• HIV/AIDS (from 1981; virus via chimpanzees): 25-35 million deaths.
• Swine Flu (2009-2010; H1N1 virus via pigs): 200,000 deaths.
• SARS (2002-2003; coronavirus via bats/civets): 770 deaths.
• Ebola (2014-2016; ebolavirus via wild animals): 11,000 deaths.
• MERS (from 2015; coronavirus via bats/camels): 850 deaths.
• COVID-19 (from 2019; coronavirus of undetermined origin): 165,257 (as of this Monday at 9 a.m., per Johns Hopkins University).

Note: These estimates are derived from peer-reviewed research. Figures for events like the Plague of Justinian and Swine Flu remain subject to debate.

Lessons from COVID-19

The vast majority of these pandemics stem from zoonotic diseases—pathogens jumping from animals to humans. Emerging evidence links these spillovers to human-driven environmental changes, as habitat encroachment fosters closer human-animal interactions.

Emergence hotspots cluster in regions like China and Africa, yet global trade enables rapid worldwide dissemination. COVID-19's outbreak, while unprecedented in scale, aligns with these patterns and serves as a stark reminder.

Without shifts in behavior, similar crises are inevitable. Recognizing the interplay between human activities and public health risks is essential to developing sustainable strategies that mitigate future threats.