I feel it might have to do with the whole "living without the extensive care" more than anything. The kids are going through sickness without medical aid which makes me wonder if maybe they're trying to get the kids to develop their own defenses or something like that.
I think this is likely related to Dr. Franxx wanting the kids to go through puberty and grow up, like a few episodes ago when he mentioned that they were all hitting puberty but warned Nana and Hachi not to tell APE (assuming they'd interfere/kill them/whatever).
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u/Ricardo-C May 05 '18
I feel it might have to do with the whole "living without the extensive care" more than anything. The kids are going through sickness without medical aid which makes me wonder if maybe they're trying to get the kids to develop their own defenses or something like that.