Definition:
A hereditary blood disorder caused by a mutation in the beta-globin gene, leading to abnormal sickle-shaped red blood cells. These cells can block blood flow, causing pain, anemia, infections, and organ damage.

UPSC PYQ Year:
Science & Tech / Health and tribal welfare-linked themes have appeared repeatedly, especially in current affairs-based prelims questions.

UPSC Prelims Pointers:
Genetic disorder (not infectious); inherited in autosomal recessive form; common among certain tribal populations in central and western India; linked to National Sickle Cell Anaemia Elimination Mission (target year 2047); symptoms include vaso-occlusive crisis, fatigue, jaundice, splenic complications; screening and genetic counselling are key.

Time Period / Context:
Became a major public health and social justice issue in India due to its concentration among vulnerable tribal communities.

Related Schemes / Reports / Committees:
National Sickle Cell Anaemia Elimination Mission; Ministry of Health & Family Welfare; National Health Mission.

One-line Trap Point:
Do not confuse it with iron-deficiency anemia — sickle cell anemia is a genetic hemoglobin disorder.

Static + Current Affairs Link:
Important for linking public health, genetics, tribal welfare, and inclusive healthcare delivery.

Possible PYQ-style MCQ Angle:
Whether it is hereditary or infectious; which communities are most affected; mission target year; and relation to hemoglobin mutation.