The five inoculation videos are effective at improving resilience to misinformation, but not forever: if you only watch them once, their effectiveness decays slowly over time. This is why we’ve designed short “booster” videos. Much like regular vaccines sometimes require top-ups to remain effective, the boosters serve as a top-up for the longer videos. We ran a study testing for how long the inoculation effect remains detectable with regular boosters, finding that watching a booster video 10 days after the original video staves off decay for at least a month. We’ve designed two boosters so far, both about the “emotional language” video. You can watch them below.