If it could be employed - it is much better than nothing. So if the immune system is somewhat functioning it may be enough. And with the amount of garlic eaten

If it could be employed - it is much better than nothing. So if the immune system is somewhat functioning it may be enough. And with the amount of garlic eaten - the LD50 of the stuff will be insanely high. And the antibiotic properties of garlic are wildly known.