Stephanie was usually careful about her health and regular vaccinations. But then she got into sharing conspiracy-filled videos and fringe ideas. When COVID hit, misinformation put her and her husband at risk. Science correspondent and editor Geoff Brumfiel shares with Emily Kwong what he learned in reporting Stephanie's story. You can follow Emily on Twitter @EmilyKwong1234 and Geoff at @GBrumfiel. Email Short Wave at ShortWave@NPR.org.