Genocide?
I didnt get the last bit he said; did the guy who remained know that he would give them a virus?
which would have been a double sword, if the two brought back alien pathogens
http://my-impressionz.tk
Cavor had a virus from the heat inside the home and the temperature difference outside his house. He went to the moon with a "cold".
The closing line of the film was; "Poor Cavor. He did have such a terrible cold." Meaning that he knew the cause of the Selintes demise, but as a young man probably had no idea of anything regarding viruses and so forth.