Stitch provides message read receipts for accountability and reliability in healthcare messaging. To view the message read receipt, click the down carrot on your message to open the message options menu and select "Info".
You'll see a list of everyone the message was 'Delivered to' and 'Read by'. Since the members of the room change over time, this list shows only who the message was sent to at the time that it was sent. So, if a user joins the room later, they won't appear retroactively in the message read receipts for past messages.
Delivered to: This indicates who the message was delivered to. Everyone in the room at the time the message the message was sent will start out in this list.
Read by: Once someone reads the message, they are removed from the Sent list and appear in the Read list. Reading a message means that a member opened the conversation and saw the message.