In 1849, British physician Thomas Addison provided the first clear description of the disease, which is why it was originally known as Addisonian anemia.
In the 19th and early 20th centuries, patients diagnosed with "pernicious" (meaning deadly) anemia faced a grim prognosis. antipernicious anemia factor
Patients suffered from a slow, agonizing decline marked by severe pallor, extreme fatigue, a smooth and fiery red tongue, and irreversible neurological damage leading to paralysis, dementia, and death. In 1849, British physician Thomas Addison provided the