While filling out the consent form for my annual flu vaccination at a local drugstore, a brand-specific question caught my eye: Are you currently on home infusions, weekly injections such as Humira® (adalimumab), Enbrel® (etanercept), high-dose methotrexate, azathioprine or 6-mercaptopurine, antivirals, anticancer drugs or radiation treatments or Remicade® (infliximab)? Representing three of the four largest…