Hello!

Based on what I can see in the photograph, I think that you do not have a currant bush there, rather it is a three-leaf (aka skunkbrush) sumac, a native shrub.  The fruits certainly have some cottonwood fluff on them; it's a bit tough to say if I can also see the cast molts of aphids, which could be there to take advantage of the growing fruits.

You can take no action (the long-term risk to the plant is nil), or consider washing the fruits with a strong jet of water to remove any aphids, if they are indeed present.

I hope this helps!

Cordially,

John

Thank you!