What ancient diseases no longer exist?

The Ancient Plagues We Have Eradicated

Throughout human history, infectious diseases have shaped civilizations, often causing widespread devastation. However, thanks to breakthroughs in medicine and global public health efforts, humanity has successfully wiped out some of its oldest viral foes. While many people believe that illnesses like measles, polio, or influenza are completely extinct, officially only two infectious diseases have ever been globally eradicated.

The most famous victory is against smallpox. Caused by the Variola virus, smallpox afflicted humanity for thousands of years, causing severe epidemics and millions of deaths. Following a massive worldwide vaccination campaign led by the World Health Organization, smallpox was officially declared eradicated in 1980.

The second disease ever eradicated is rinderpest, commonly known as cattle plague. Though it targeted livestock rather than humans, rinderpest destroyed cattle and buffalo populations across Europe, Asia, and Africa for centuries, triggering devastating famines. Through rigorous animal vaccination programs, it was declared fully wiped out in 2011.

Other ancient illnesses such as polio, measles, mumps, and hepatitis B are often mistaken for extinct diseases because vaccines have rendered them rare in many regions. However, unlike smallpox and rinderpest, these pathogens still circulate in parts of the world, highlighting the continuous need for global immunization efforts.