Was Missouri’s bird flu case a one-off or something more? Quest for answers faces testing delay STATWhy fears of human-to-human bird flu spread in Missouri are overblown The Washington PostMissouri investigates more possible human-to-human H5N1 avian flu spread cidrap.umn.eduScientists race to investigate possible human transmission of H5N1 in US outbreak The TelegraphMore health-care workers in contact with Missouri bird flu patient report respiratory symptoms CNN