Amidst the horror, the support seen for the Ukraine is wonderful.

Years ago, I have added Ukraine to Blood Type Frequencies by Country including the Rh Factor with a national average of 14% Rh negative.

Now there are several studies out highlighting huge regional differences in terms of both, ABO and Rh(D) gene frequencies:

[The genetic differentiation of the human populations of Donetsk Province, Ukraine. The distribution of ABO and Rhesus blood group systems]

We have detected the irregular genetic-population structure of residents of the Donetsk Province with respect to the AB0 and Rh systems with a general formula A > 0 > B > AB, the only exception being Slavyansk where it probably is 0 > A > B > AB. Two out of nine populations studied differed greatly from the others. The two other populations exhibited a high degree of similarity with a distant population in Russia (Novocherkassk) that can be attributed to the common history of their population.

https://pubmed.ncbi.nlm.nih.gov/7974783/

[Gene frequencies and heterozygosity of the AB0 and RH blood group alleles in the populations of two cities of the Donetsk region, Ukraine]

The frequencies of the AB0 and RH blood group alleles and heterozygosity indices were determined for the populations of two large industrial cities of Gorlovka and Mariupol. In the population of Gorlovka the gene frequencies were as follows: AB0*0 = 0.576, AB0*A = 0.266, AB0*B = 0.158, and RH*D = 0.592, in Mariupol the frequencies were AB0*0 = 0.584, AB0*A = 0.265, AB0*B = 0.151, and RH*D = 0.604. In Gorlovka the heterozygosity indices in respect to the AB0 and RH alleles were 0.572 and 0.483, respectively; in Mariupol, 0.566 and 0.478, respectively. There were no statistically significant differences between the two populations in respect to the genetic markers analyzed. However, the heterozygosity values obtained were more similar to the corresponding estimates for some populations of Russia, than for the total population of the Ukraine.

https://pubmed.ncbi.nlm.nih.gov/12760254/

[Gene frequencies and heterozygosity of the population of Donetsk Province, Ukraine by the alleles of the ABO and Rhesus systems]

Frequency and heterozygosity indices of AB0 and Rh gene systems in the population of Donetsk Province were calculated. Uneven distribution of the genes was found and heterozygosity indices of the population were 0.554-0.573 for AB0 and 0.410-0.499 for Rh. Heterozygosity in this population was higher than average heterozygosity in total population of Ukraine as a result of intensive migrations and prevalence of heterolocal marriages over homolocal ones.

https://pubmed.ncbi.nlm.nih.gov/10474857/

[Distribution of ABO and Rhesus phenotypes and genes in the population of Kursk region]

The distributions of AB0 and Rhesus phenotypes and the corresponding genes in the population of Kursk oblast were studied. Based on these data, genetic differentiation of rural populations with respect to the d gene frequency was revealed. The differentiation was determined by the differences in the genetic and demographic structure of these rural populations. The frequency of homozygotes for the recessive gene d and the incidence of malformations affecting the children’s viability increased with an increase in the inbreeding level of a population. Genetic distances between the population of Kursk oblast and other populations were estimated.

https://pubmed.ncbi.nlm.nih.gov/10205745/

What percentage of the Ukraine is Rh negative?