The eradication of infectious diseases is the reduction of the prevalence of an infectious disease in the global host population to zero.
A child with smallpox, 1896. In 1980, the World Health Organization announced the global eradication of smallpox. It is the only human disease to be eradicated worldwide.
Boy with smallpox (1969)
"Yaws elimination in India – a step towards eradication"
From 1962
Extinction
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Extinction is the termination of a species via the death of its last member. A taxon may become functionally extinct before the death of its last member if it loses the capacity to reproduce and recov
Eradication of infectious diseases
…Neglected tropical diseases Planned extinction Sanitation…
The thylacine (Thylacinus cynocephalus) is an example of a recently extinct species.
Palaeotherium is an example of an extinct genus that is only recorded from fossil records before the existence of hominids.
External mold of the extinct Lepidodendron from the Upper Carboniferous of Ohio
The dodo of Mauritius, shown here in a 1626 illustration by Roelant Savery, is an often-cited example of modern extinction.