Dr Badgerson is a surgeon from Oxford UK, born and raised there. He transferred to Chernarus to help those who were injured during the civil war of '09 and was known through out the city for his great work.
In his younger years he went to join the Navy but after several months he left due to a knee injury. He trained to become a doctor so that he could at least help injured soldiers and veterans and not feel completely helpless.
Dr Badgerson was performing a routine surgery when he heard rumour of an attack at Severograd from Russion soldiers. Despite the rumours he headed down there a risked his life to save those her were in need of aid.
He was working in the hospital of Severograd when the infected hit. His training could never prepare him for what he had seen at that hospital and whatever his patients were suffering from but he knew it was turning them into something evil.
Due to his military expertise he was able to escape that night and return to Chernarus. He now helps the survivors who were able to avoid getting attacked by the infected.