It should be "inoculated against" but the meaning is clear. A vaccine inoculates you against a disease by a physical mechanism: that is, it prevents you from g

It should be "inoculated against" but the meaning is clear. A vaccine inoculates you against a disease by a physical mechanism: that is, it prevents you from getting that disease (to a greater or lesser degree). Metaphorically being inoculated against something means it can no longer hurt you. For instance, maybe by not owning a car you're inoculated against vehicle depreciation. Or by wearing the same simple but quality outfit every day you're inoculated against the vagaries of fashion.