Infections...

[Cellulanus]

If I understand well, Das Wilde is mostly composed of nomad infected Rheinlander soldiers/officers/politicians and a minority of Kusarian Soldiers/Officers/Politicians.

Does that mean...

A) Bretonians never were bugged by the Nomads?

No, as Orillien said, every house was infected, if not the leaders then key military units in the feilds.

B) Every infected people left their former planets? Or some infected politicians/officers could fake being fully human and wait for a proper moment to "strike"? (Including Liberty!)

Any one's that weren't IDed would have remained where they were, the rest would have run

C) Can an infected infect/pass his infection to someone else without the help of a Nomad?

I point to SP where the Kanzler was about to infest the Liberty President, they are fully capable of infesting new hosts.

D)Can artefacts infect human?

'Tis was not the artifacts themselfs that infested the humans, but the Nomads. It is possible that some artifacts held nomad "eggs" or whatever nomad infants are within them, but other then that they are only as dangerous as what they were originally built to do, and how the Nomads could use them.

Deeply sorry if these questions were answered in the Nomad Lore...