Transcendent Doctor

In her previous life, the immortal realm's 'Plague God' Gu Yan Mu Chan was betrayed and her soul crossed over to Earth. When she woke up, she was a poor medical school dropout who couldn't even afford next month's rent. But she quickly discovered that the oldest life forms on Earth are not humans, but the invisible microorganisms. Over billions of years of evolution, they have built a sophisticated system far beyond the immortal realm's understanding. While other doctors use observation, auscultation, and inquiry, she opens her 'immortal sense' and directly communicates with bacteria. While others use medicine to kill germs, she holds 'meetings' with viruses and negotiates terms. Stomach problems? Helicobacter pylori is throwing a tantrum; just soothe it. Cancer? That's an imbalance in the cellular microbiome; re-arranging the 'battle formation' can reverse it. In her hands, difficult and miscellaneous diseases are nothing more than 'neighborhood disputes' in the microbial world. With the system in hand, skills are honed through use. Early on, leveling up is like a rocket; later, to level up once? Sorry, you'll have to search the world for opportunities. But just as she's thriving on Earth, the aura of the 'Super Bacteriophage Immortal' that betrayed her in her past life quietly emerges in the depths of the city... Healing humans, ghosts, and immortals alike, crossing realms starts with crossing microorganisms. — Description from novelcodex.org