Global Update: New Polio Strains That Protect Vaccine Factory Workers

[unable to retrieve full-text content]The strains have the same ability to invoke an immune reaction as the live viruses now used to make vaccine do, but with no risk to vaccine factory employees.

Source: http://www.nytimes.com/2013/02/19/health/new-polio-strains-that-protect-vaccine-factory-workers.html?partner=rss&emc=rss

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