[fso301]

It appears that these ‘visitors’ have been visiting for centuries, millenia perhaps! Could it be that they are waiting until we develop some societal system similar to their own before they make official contact? ... Think about it: we humans aren’t likely to go ‘hive style’, so what if that is the system the visitors use? What religious or societal systems approach a hive mentality in our day? ... Islam anyone?

Think about your immune system and the implications of coming in contact with life forms your immune system has no evolutionary protection against.

[MHGinTN]

Step ahead, beyond just the primitive immune system, to think about having a DNA transplant, which grows the ‘societal style’ you want to ‘evolve’ in the species.

[Roccus]

Think about your immune system and the implications of coming in contact with life forms your immune system has no evolutionary protection against.

....which is exactly the reason early astronauts to the moon were quarantined upon their return to earth.