[skalchemist, the book is clear that you are not allowed to magically heal the same subject a second time until after he taken new injury that have not already been treated by magic healing.
SR6 p. 120 Magic
A character can be healed by Magic only once for any single set of injuries.
SR6 p. 136 Cleansing Heal
Injuries can only be affected once by any healing spell.
SR6 p. 136 Cooling Heal
Injuries can only be affected once by any healing spell.
SR6 p. 137 Warming Heal
Injuries can only be affected once by any healing spell.
SR6 p. 136 Heal
Injuries can only be affected once by any Heal spell (including Cleansing Heal, Cooling Heal, and Warming Heal).
Xenon, what you call clear I call confusing. You are assuming "single set of injuries" = "all the damage taken in a combat encounter" (if I am understanding your earlier post). But setting aside previous edition knowledge (which I do not have), why does it have to mean that? My instinctual interpretation of that phrase is "all damage taken from a single attack". That would mean you could roll a heal spell for each attack, but if that healing did not clear off all that damage, the remainder would linger, but it wouldn't matter what order the attacks occurred. That would be more like "injury" was referring to the actual physical wounds. Consider this example:
Bob gets shot by a guard firing on Burst Fire and takes 3 damage. Then he gets shot by the same guard on Burst Fire and takes 3 more damage. Then he gets shot a third time by the same guard on Burst Fire and takes 3 more damage. Now I try to heal Bob.
Your interpretation is that all of those 9 damage are one "set of injuries". Reading other replies here, I think this is probably what the designers intended. But in the fiction, each of those attacks also caused a "set of injuries" in the English language sense of the phrase. Each attack meant that Bob was hit by one or more bullets, causing one or more holes in poor Bob. Each attack conceivably caused injuries, plural, to Bob and therefore could be considered a "set of injuries" in and of itself. Under that interpretation, each package of 3 is a different "set of injuries". I could therefore use heal on him three times. In fact, I would HAVE to use Heal on him three times if I wanted to try to heal him completely, because I couldn't heal all 9 damage at once, I could only heal it the chunks of 3.
The consensus seems to be that your interpretation is correct, and I'm fine with that. But I disagree, it is not clear at all, that's why I asked the question. I'd like to think if it was clear, I wouldn't have needed to ask.
