Partula snails were driven to extinction in the wild by introduced predators.
Before we decide to eradicate or control an invasive species, like carp, we need plenty of scientific evidence and independent assessments first.
Polio vaccinators carry boxes of polio vaccine drops as they head to the areas they have been appointed to administer the vaccine, in Karachi October 21 2014.
Researchers are piloting a smartphone app to collect better information about who is getting vaccinated and to design better incentives for health workers on vaccination drives.
In 1986 Guinea-worm disease infected 3.5m people. Simple interventions have since ensured that in 2013 only 148 cases were recorded. With a final push, this could be the third disease to be eradicated…