Psychic virus
From Tardis Wiki, the free Doctor Who reference
The Psychic Virus was an alien virus that infected the Thirteenth Doctor when travelling to the Unmarked Purlieus Star System with her friends. It subsequently began to attack anyone who had any knowledge of her, sending them to the Psychic Realm and leaving behind ghosts. As the Doctor had travelled to Earth frequently the infection began there, finally being defeated by Cleo Proctor. (AUDIO: Salvation)