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Understanding that the whole thesis of contact tracing may just fall on this very issue [ of super spreaders ], if you have a small number of cases, you can clearly try to contact trace all of them, and you're not wondering if they're super spreaders or not. With many thousands of cases, you're always going to be trying to determine : what are the highest priority ? If you don't have a sense of who the super spreaders are, there's no way you can [ factor ] that in.