five years. five years ago, almost all these chains you just saw there routinely used antibiotics in chicken and now more than half don't do it. so you're seeing a significant shift when it comes to chicken. still a ways to go with beef. but the health implications are really clear here. this is sort of a gimme if these restaurant chains stop using the antibiotic-used meat. >> that's so helpful to know. >> you can only go to panera or chipotle. >> or go and just feel bad about it which is sort of the story of my life. >> instead of going to the doctor just eat a burger. >> what i need is more guilt. sanj sanjay, thank you. the washington nationals historic world series victory, it's only nine hours old. but the nation's capital preparing for a giant parade. we'll speak to legendary sportscaster bob costas about it all, next. tremfya® helps adults with moderate to severe