Vadim is one of the characters in the story. He can be found at the Institute of Virology in Moscow. You will not get much information from him because he is dying. He was attacked by a black wolf, which is still in hiding. He lies unconscious against a desk when you first discover him. Part of his thigh is torn off and one foot is missing. He mentions someone named Alex whom you will meet later. He dies before he can give more information.