Infections are a new feature in Raid Hub requested by several users. This is a new section in the alert window that displays detriments. In the Spell Timer and Trigger Editors, you can mark an items as “Infection.” When it is detected, the affected player and the spell/trigger is displayed with a counter. It’s also important to use Detect All Hits with this setting, since detriments often hit 2 people at a time. Here’s what the new alert window looks like with Infections working (example is Modrfrost):

NOTE: Detect All Hits and Infections ONLY work for the first tick of a dot (6 seconds), so you will not end up with a ton of players listed if it does spread.