Deformed them? [He's not sure what to picture at that. But in the end it sounds like they managed. Better than Japan did in the aftermath of their virus back home.]

Our virus...basically killed most all the adults above the age of thirteen. I was eight, when it happened. Was taken underground. For 'protection'.

[If it hits, this time he and Mika won't be able to avoid it. They are over the age of thirteen. Of course, their seraph gene, Mika being a vampire, Yuu part demon, that could factor in but still.]