CHICAGO — More than 70 combined years of food safety advocacy and research by John Butts and Purnendu Vasavada was recognized with Lifetime Achievement Awards at the 18th annual Food Safety Summit today. NSF Food Safety Aware presenters and honorees at the 18th annual Food Safety Summit are (from left): presenter Shelly Feist of the Partnership for Food Safety; honorees John Butts, Judy Harrison, Gary Acuff, who accepted the award for Purnendu C. Vasavada; and presenter Lori Stephens, of NSF International. NSF Food Safety Award presenters and honorees at the 18th annual Food Safety Summit are (from left): presenter…