Distribution of ABO and Rh (D) blood group and allele frequency in North-East India: a systematic review

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Systematic review analyzes blood group and allele frequency in North-East India, revealing significant ethnic variations.

Blood group O is the most prevalent in North-East India, found in 36.07% of individuals analyzed.
A total of 40,513 individuals from seven states were included, indicating a significant sample size for analysis.
Allelic frequencies calculated using Hardy-Weinberg equilibrium showed IA (p)=0.22, IB(q)=0.18, and i(r)=0.60.
About 98% of the studied population is Rh(D) positive, highlighting dominance of this blood type in the region.

Gupta et al. (2025) studied this question.

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