Vaccine-derived polio virus found 50 times in India in six years
The vaccine-derived polio virus is a rare strain of polio virus that has genetically mutated from the strain contained in the oral polio vaccine
Polio eradication: we are not there yet
On the occasion of World Polio Day, we take a look at the challenges that three countries are facing in eradicating this debilitating disease
The 'vaccinegate' of Italy
A study in Italy has found major contaminants in vaccines that are used the world over
