How to explain things so elementary? Roku figured he'd tell Akira what he was taught and he tilted his head a little, "Vaccinations are shots  that doctors give you to prevent you from getting sick." he said as he petted Akira's head. Now how would he have Akira get vaccinations? Or would he have to keep Akira trapped inside his apartment so he wouldn't get sick all together? "Do you want to go to bed now?"