Yes, it is advisable to take an anti-rabies vaccine if you were scratched by a monkey, even if the wound is small. Monkeys can carry the virus that causes Rabies, and scratches can sometimes transmit infection if saliva is present. First, wash the wound thoroughly with soap and running water for at least 10-15 minutes, apply an antiseptic, and visit a doctor or nearby hospital as soon as possible. The doctor may recommend starting the Rabies Vaccine and, depending on the wound, Rabies Immunoglobulin. Taking the vaccine on time is the safest way to prevent rabies.