Globally , measles still is a leading cause of death among children , killing an estimated 450 people every day , according to the World Health Organization . 80 % of people living in the United States are using all vaccines for their children . 2011 has seen more cases of measles than in any year since 1996 . In Europe , the measles outbreak has been far worse than in the United States .
80 % of people living in the United States are using all vaccines for their children . 2011 has seen more cases of measles than in any year since 1996 . In Europe , the measles outbreak has been far worse than in the United States .