> that the infant will ingest it. Unless someone is doing it _very_ wrong, they are not going to ingest the buffer solution. The Swab does not contain sodium

> that the infant will ingest it. Unless someone is doing it _very_ wrong, they are not going to ingest the buffer solution. The Swab does not contain sodium azide (well it shouldn't). So unless the infant is double dipping, or left alone within grasp of the test kit, its not a high risk. The bigger risk is the misplaced swab.