Red spiky lumps on rose leaves and flower buds

Hi, I have recently noticed that my rose leaves were curling quite heavily and now I have just found these strange red spiky buds on both leaves and flower buds. Are they some type of galls or is it maybe a virus? How much should I worry about it and what should I do?
I tend to garden organically as much as possible, so if there is any other option rather than spraying chemicals I would be very happy.
Thank you so much for your help, so far it's always been very precious :-)

Irene