Robert Reed's short story "Pallbearer" (2010) deals with most of the developed world's population dying after a mass vaccination program in which the vaccines were purposefully tainted. The survivors are those who were not vaccinated, often for religious reasons, and their descendants. Most of the developing world does not receive the vaccine, and decades later, large numbers of its refugees are arriving to America's shores. The protagonist survives the disaster as a young boy and has a chance encounter with an elderly scientist and her fanatical younger family members.