Do not panic!
You need not worry
First of all a rodent like rat bite cannot spread rabies and usually anti rabies vaccine is not given for such cases
Secondly your sister has already taken arv 1 year back hence she has the immunity and so hrig is unnecessary in this case
Next Steps
All you have to do is take a TT injection if she has not taken it for more than 3 years
wash the wound thoroughly with soap and water
Health Tips
consult for further queries