Without that motivation, many developed nations have prioritized other health issues. Coupled with a backlash against vaccinations, this shift in focus has given us the current vaccine stagnation. As a 2011 paper on the potential for measles eradication points out, "recent progress in reducing measles mortality may have reduced the perception of threat." But the threat is very real. According to the same paper, "measles has been a disease of high burden historically, and as recently as 2000, an estimated 733,000 individuals, mainly children, died from complications of measles."