What's wrong with Mom's Impatiens?

My mom's impatiens are getting these spots on the leaves with yellow and fall off. What's the diagnosis?
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looks like necrotic spot virus http://www.umass.edu/umext/floriculture/fact_sheets/pest_management/insvtswv.html http://www.rhs.org.uk/advice/profiles1205/impatiensnecroticspot.asp http://www.coopext.colostate.edu/TRA/PLANTS/index.html#http://www.colostate.edu/Depts/CoopExt/TRA/PLANTS/insv1.html

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If any of the plants are in pots, get them into the sun, and clip them back a bit to encourage new growth. Just be aware that pots in the sun can dry out in a matter of hours.
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