Ok, so an explosion happened which contaminated the atmosphere and what caused the little sisterās skin to be damaged was the rain full of toxic materials. Like an acid rain.
People and things in the outside world became dangerous so the citizens had to stay inside and avoid contact by all means necessary.
However, mutations such as the little girl with wings on her back existā¦
What happened was a nuclear explosion or bombing large enough so that the outside world and everything in it is contaminated and humans themselves are too, which leads to mutations ā you canāt really escape from that one just staying inside your house, chief. Everything you eat, the air you breathe, itās everywhere, dude.
Her sister was probably a victim of the āblack rainā caused immediately after. I take it that the atmosphere was so contaminated that every time it rains, it has this black rain aspect.
https://www.civilsdaily.com/news/what-is-black-rain/
And since we are in an apocalyptic scenario, the explosion was on a global scale, which I canāt even begin to imagine what it would look likeā¦
Only thing that made people want to ādisposeā of that child was pure ignorance to the effects of long-term exposure to radioactivity can have on people and their descendants. Children born after the event might show some mutations compared to the survivors that ālucked outā, the population should be aware of that.
I mean, recent studies do show that accidents such as Chernobyl donāt necessarily cause mutation on the descendants, but in the oneshotās scenario the exposure is continuous, so mutations could be way more common than what weāve seen in the real world.
https://www.nationalgeographic.com/...l-survivors-dont-carry-more-genetic-mutations
https://www.nih.gov/news-events/nih-research-matters/genetic-effects-chernobyl-radiation-exposure
But what do I know? I donāt do science. I can guess tho that they wonāt die immediately after they escape if they find somewhere to hide from the rain. Next possible course of action would be to search for another facility? Or maybe join people who rebelled against the government??? Something like that.