I haven't a lot of time, apologies for any inaccuracies -first thoughts.
Aphid damage gives a lot of plants a crinkly appearance-I notice it in
outdoor fuchsias and indoors in
I don't think a virus infection could be transferred from phlox to fuchsias.
Phlox related to or part of the brasicca family might suffer from molydenum
defiiency which causes whiptail and this could result from their having
spent too long in a peat based compost.
They should recover in an average garden soil in the UK-Mo deficiency is
mainly seen in cauliflowers in this country, where it is countered by adding
lime.It happens to be a serious problem in NewZealand South Island where
large areas have been treated to enable native tussock grasses to be
replaced by more nutritious European species.
I wouldn't recommend adding lime to a flower border, an average soils should
do the trick and the problem should go away.
Regards