For safer vaccines in polio-free world

AS the world is approaching the goal of polio virus eradication, there are concerns among scientists about post-eradication manufacturing and stockpiling of vaccine containing the live virus that could escape and repopulate the environment. A study published in a recent issue of PLOS Pathogens reports the generation of new vaccine strains that appear both effective and unable to cause disease after an accidental or intended release.

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