A virus deadly only to young pigs, with no danger for humans, appeared in the United States last spring in Ohio and in weeks had spread to four other states. Continue reading here:   Hog Producers Battling to Contain Virus That Has Killed Piglets by the Thousands ; ;Related ArticlesOp-Ed Contributors: A Republican Case for Climate ActionDot Earth Blog: With Arrests, Signs of Justice in Slaying of Costa Rican Turtle GuardianNational Briefing | Washington: President Orders Review of Chemical Plant Safety ;

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Hog Producers Battling to Contain Virus That Has Killed Piglets by the Thousands