I?m already getting the anti rabies vaccination, & have finished 0,3 & 7 days one? i?m only left with the 28th day one but in between this, i?ve got a minor nail scratch from another street dog? What should I do? Do I have to repeat the entire course or just taking my 4th vaccine will be enough, i?ve thoroughly watched the scratch, it is barely visible but still it looks a little red, so didn?t take the risk of not washing. Please let me know.