We did have a choice of the Serum or injections, choose the serum because I didn't want to do the injections everyday for a month, I think it is worth paying a bit extra to not put the dog through all that pain fron the jabs. The jabs can  also affect the liver.  the serum was about 140 euros for 20kg dog. So not so bad.
Just so pleased that hopefully now there will be less dogs suffering soon if they have the vaccination :D