(CNN) -- Federal health authorities recommended Monday that doctors suspend using Rotarix, one of two vaccines licensed in the United States against rotavirus, saying the vaccine is contaminated with material from a pig virus. "There is no evidence at this time that this material poses a safety risk," Food and Drug Administration Commissioner Dr. Margaret Hamburg told reporters in a conference call. Rotarix, made by GlaxoSmithKline, was approved by the FDA in 2008. The contaminant material is DNA from porcine circovirus 1, a virus from pigs that is not known to cause disease in humans or animals, Hamburg said. About 1 million children in the United States and about 30 million worldwide have gotten Rotarix vaccine, she said.
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Doctors have been advised to suspend use of Rotarix rotavirus vaccine
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Another vaccine, RotaTeq, is still OK to use, officials say
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GlaxoSmithKline, maker of Rotarix, says the contamination is not harmful
The FDA learned about the contamination after an academic research team using a novel technique to look for viruses in a range of vaccines found the material in @placeholder's product and told the company, Hamburg said.