Checking Wikipedia is another compulsion of Aza's. Like re-bandaging her finger, it gives her a sense of control over her fears by giving her language and information to understand the bacterial world inside of her. Notice that when she describes spirals here, she describes them as tightening rather than spreading. For her at this point, spirals only go one direction: inward. This is expressive of her general mental state, in which he anxiety causes her to feel out of control.