You are using an older browser version. Please use a supported version for the best MSN experience.

Seth MacFarlane calls out anti-vaxxer parents on Twitter

Seth MacFarlane spoke out in support of vaccines, while at the same time slamming parents who opt not to vaccinate their children, on Thursday.

UP NEXT

UP NEXT

More From Yahoo Entertainment US

More From Yahoo Entertainment US

image beaconimage beaconimage beacon