and we dindt takeinto acount aids that is a silent and slowy killer...i think another plague or spanis flu today is imposible because we would isolate pacients when thinks get really serious martial law is dwecreted and the andemic is over but with aids that is imposible and no cure on the horizont

take a loock at the period betwen them!!!! it takes minimum 400 years to another one to come..so if these is not pure casuality..we had the spanish flu 100 years ago so it wul take another 300 years minimum for another one..altrough today is more easier for a virus to spread in 300 years humans will have nanorobots into theur blood to fight any kind of virus