Are vitamin B12 injections safe during pregnancy? Thalassaemia HaemBase Full article: A Case of Pernicious Anemia with Concurrent Beta Thalassemia Minor Thalassemia: High Yield Notes Inherited microcytic anemia ( globin chain production) severity varies from trait (mild) to major (severe) Key Concept Microcytosis from reduced hemoglobin synthesis Trait often mild asymptomatic;