This is the history of the KERBALS, not the Kau or Tau. Moving on... 4160: No nation have changed name, although the organization Kerbal Nations did change name numerous times, finally settling the original name (Kerbal Nations) because others sounded somewhat crazy. 4200: The disease that caused a pandemic back in the early 4150s, now classified as DNAD (Deoxyribonucleic acid deficiency) virus, dropped the bomb again. The Tau were almost wiped out, while the Kerbals suffered negligible loss, due to the vaccine invented a while ago. Again, this DNAD variant still destroys DNA of the fallen victims.