Managing Expectations for Guinea Worm

Smallpox is the only human pathogen has ever been eradicated; guinea worm was set to be the second by 2020—until now.

WHO has “quietly” rolled back that target to 2030, reports Leslie Roberts.
 
The horrifically painful parasite, known to live in contaminated drinking water, eventually leaves the body by bursting through the skin.  
 
Infections plummeted from 3.5 million a year in 1986 to just 28 in 2018. So why the delay?
 
New forms of transmission have been discovered which scientists still don’t fully understand. Perhaps most worryingly is the mysterious surge in cases among dogs in Chad—which may render eradication impossible.
 
Nature

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