Flu season is upon us, have you gotten your shot yet? You may be apprehensive because it doesn’t always work—for instance, last year’s flu vaccine was only 40 percent effective. If flu strains weren’t so diverse it wouldn’t be such an issue, which is why “mega-antibody” vaccines capable of protecting against multiple strains would be cool. Last week, researchers published a study detailing the process they used to develop one of these vaccines, which combined the fun-sized antibodies that llamas produce to make a vaccine capable of protecting mice against 59 of 60 flu strains they tested against. However, human antibodies are bigger, so they might not fit together nicely like llamas’ do. But even a vaccine that could protect against just a few strains could drastically affect infection rates. Here’s a likely delivery mechanism.