A 31-year-old traveller presents to the Emergency Department after a dog lick to a superficial abrasion sustained while hiking in Morocco, a country where rabies is endemic. The abrasion had been present before the exposure. He rinsed the area briefly with water but did not seek medical attention at the time.

He has never received rabies vaccination.

Following formal risk assessment using United Kingdom Health Security Agency rabies post-exposure treatment guidance, the exposure is classified as Amber risk.

What is the most appropriate treatment regimen?