Doctors' reports seem more trustworthy than patient social media because patient social media is likely to have a stronger selection bias. If you're in excrucia

Doctors' reports seem more trustworthy than patient social media because patient social media is likely to have a stronger selection bias. If you're in excruciating pain (or just part of an older demographic) you're less likely to be tweeting about it than if you have a mild cough, so expect harsher symptoms to be underrepresented.