@altschmerz No, it's not. That's why I said "Maybe." Still, ticks? Countermeasures against ticks are cheap and effective though, and ticks don't exactly seek out hosts. It seems like a poor choice of vector for a biological agent, your infection rate would be low to begin with, and almost nil if defended against. And it's neither a contagious nor debilitating disease, again an odd choice for a bioweapon. And before 1969 was long before DNA was fully understood, where did they even come up with this basically almost useless biowarfare disease? the more one thinks about it, the more unlikely it seems.