Questions about Episode 10

I have been thinking about those questions a long time and I would like to know if somebody has answers to them.

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1. Why does Zorome feel familiar around the old lady? Is he maybe genetically based on her?
2. What does the old lady say when she is being muted by the sound at 21:05? ("After all you are ......")
3. What is meant by "infected child"? Is it because they live in a more natural environment without the constant use of disinfection sprays or are they actually infected by a virus or something(e.g. the yellow blood cells or the "parasite injections" they get as children)? Or do they consider normal biological life as living infected since they do not run on magma energy hearts etc.?
4. Why do the civilians of the city consider the infected children as "victims in all this"?
5. Why does Zorome have flashbacks from the "old custom to procreate" at 15:15?

Thanks for your help!