Carol Pandak says tests found the new vaccine to be thirty percent more effective than the trivalent vaccine.

VOA: special.2010.01.18

But Carol Pandak says the monovalent vaccine is not enough in areas with both.

VOA: special.2010.01.18

Carol Pandak is with the PolioPlus program of the service organization Rotary International.

VOA: special.2010.01.18