DALYs are just a special case of QALYs for which there is very good weighting data available (from the WHO), because they're linked to well-defined medical conditions and disabilities. Of course one could imagine other, non-health-related interventions that would affect QALYs, but these outcomes are also harder to measure.
I disagree with this. In my opinion QALYs are much superior to DALYs for reasons that are inherent to how the measures are defined. I wrote a Tumblr post in response to Slatestarscratchpad a few weeks ago, see http://dooperator.tumblr.com/post/137005888794/can-you-give-me-a-or-two-good-article-on-why .
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