{"id":7661,"date":"2025-07-31T16:30:00","date_gmt":"2025-07-31T16:30:00","guid":{"rendered":"https:\/\/vmedo.com\/blog\/?p=7661"},"modified":"2025-08-01T06:12:45","modified_gmt":"2025-08-01T06:12:45","slug":"list-of-rare-blood-groups-in-india","status":"publish","type":"post","link":"https:\/\/vmedo.com\/blog\/list-of-rare-blood-groups-in-india\/","title":{"rendered":"List of Rare Blood Groups in India"},"content":{"rendered":"\r\n<p>Rare blood groups in India<span style=\"font-weight: 400;\"> are a lesser-known but critical aspect of our healthcare system. While most of us are familiar with common blood types like A+, B+, or O-, there are unique and uncommon blood groups that occur in only a tiny fraction of the population. For people with these rare types, a medical emergency can quickly turn into a life-threatening situation\u2014not because of the illness itself, but due to the unavailability of compatible blood.<\/span><\/p>\r\n\r\n\r\n\r\n<p><span style=\"font-weight: 400;\">In a diverse and densely populated country like India, these rare blood groups present both a challenge and an opportunity: a challenge due to the scarcity of donors, and an opportunity for compassionate individuals to step forward and make a life-saving difference.<\/span><\/p>\r\n\r\n\r\n\r\n<p><span style=\"font-weight: 400;\">This blog explores the world of <\/span>rare blood groups in India<span style=\"font-weight: 400;\"> \u2014 their types, prevalence, the challenges surrounding them, and how awareness and action can help bridge the gap. We\u2019ll also look at common blood groups in India, why extended blood typing matters, and how you can be part of the life-saving solution.<\/span><\/p>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\"><strong>Understanding common blood groups in India:<\/strong><\/h2>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\"><b>1. O Positive (O+)<\/b><\/h3>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li><b>Most common blood group in India<\/b><\/li>\r\n\r\n\r\n\r\n<li><b>Prevalence<\/b><span style=\"font-weight: 400;\">: ~35-40%<\/span><\/li>\r\n\r\n\r\n\r\n<li><span style=\"font-weight: 400;\">Universal donor for red cells (within Rh+ types)<\/span><span style=\"font-weight: 400;\"><br \/><\/span><\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\"><b>2. B Positive (B+)<\/b><\/h3>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li><b>Prevalence<\/b><span style=\"font-weight: 400;\">: ~30-35%<\/span><\/li>\r\n\r\n\r\n\r\n<li><span style=\"font-weight: 400;\">More common in South Asia than in Western countries<\/span><\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\"><b>3. A Positive (A+)<\/b><\/h3>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li><b>Prevalence<\/b><span style=\"font-weight: 400;\">: ~20-25%<\/span><span style=\"font-weight: 400;\"><br \/><\/span><\/li>\r\n\r\n\r\n\r\n<li><span style=\"font-weight: 400;\">Second most common globally, but third in India<\/span><span style=\"font-weight: 400;\"><br \/><\/span><\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\"><b>4. AB Positive (AB+)<\/b><\/h3>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li><b>Prevalence<\/b><span style=\"font-weight: 400;\">: ~5-8%<\/span><span style=\"font-weight: 400;\"><br \/><\/span><\/li>\r\n\r\n\r\n\r\n<li><span style=\"font-weight: 400;\">Universal recipient (within Rh+ types)<\/span><span style=\"font-weight: 400;\"><br \/><\/span><\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\"><b>5. O Negative (O\u2212)<\/b><\/h3>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li><b>Prevalence<\/b><span style=\"font-weight: 400;\">: ~1-2%<\/span><span style=\"font-weight: 400;\"><br \/><\/span><\/li>\r\n\r\n\r\n\r\n<li><span style=\"font-weight: 400;\">Universal red cell donor; very important in emergencies<\/span><\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\"><b>6. B Negative (B\u2212)<\/b><\/h3>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li><b>Prevalence<\/b><span style=\"font-weight: 400;\">: ~1%<\/span><span style=\"font-weight: 400;\"><br \/><\/span><\/li>\r\n\r\n\r\n\r\n<li><span style=\"font-weight: 400;\">Rare; more common in Indian population than in some others<\/span><span style=\"font-weight: 400;\"><br \/><\/span><\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\"><b>7. A Negative (A\u2212)<\/b><\/h3>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li><b>Prevalence<\/b><span style=\"font-weight: 400;\">: &lt;1%<\/span><\/li>\r\n\r\n\r\n\r\n<li><span style=\"font-weight: 400;\">Very limited availability<\/span><\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\"><b>8. AB Negative (AB\u2212)<\/b><\/h3>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li><b>Rarest among the common blood types<\/b><b><br \/><\/b><\/li>\r\n\r\n\r\n\r\n<li><b>Prevalence<\/b><span style=\"font-weight: 400;\">: &lt;0.5<\/span><span style=\"font-weight: 400;\"><br \/><\/span><\/li>\r\n\r\n\r\n\r\n<li><span style=\"font-weight: 400;\">Universal plasma donor, but difficult to find in emergencies<\/span><\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\"><b>What is a Rare Blood Group?<\/b><\/h2>\r\n\r\n\r\n\r\n<p><span style=\"font-weight: 400;\">A <\/span>rare blood group<span style=\"font-weight: 400;\"> is defined as one that is found in less than 1 in 1000 people in a given population. It may be rare globally or within a specific ethnic group or region. Some blood types are rare due to the absence of common antigens or the presence of uncommon ones.<\/span><\/p>\r\n\r\n\r\n\r\n<p><span style=\"font-weight: 400;\">Blood becomes \u201crare\u201d when:<\/span><\/p>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li><span style=\"font-weight: 400;\">It lacks a high-frequency antigen found in over 99% of the population.<\/span><span style=\"font-weight: 400;\"><br \/><\/span><\/li>\r\n\r\n\r\n\r\n<li><span style=\"font-weight: 400;\">It has an antibody that reacts against most donor blood.<\/span><\/li>\r\n\r\n\r\n\r\n<li><span style=\"font-weight: 400;\">It has a unique combination of antigens that is extremely hard to match.<\/span><\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\"><b>List of Rare Blood Groups Found in India<\/b><\/h2>\r\n\r\n\r\n\r\n<p><span style=\"font-weight: 400;\">Here\u2019s a look at some of the rarest blood groups in India:<\/span><\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\"><b>1. Bombay Blood Group (hh or Oh)<\/b><\/h3>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li><b>Prevalence<\/b><span style=\"font-weight: 400;\">: 1 in 10,000 in India (especially Maharashtra, Gujarat, Karnataka)<\/span><span style=\"font-weight: 400;\"><br \/><\/span><\/li>\r\n\r\n\r\n\r\n<li><b>Why it&#8217;s rare<\/b><span style=\"font-weight: 400;\">: Lacks the H antigen, which is a building block for A, B, and O blood types.<\/span><span style=\"font-weight: 400;\"><br \/><\/span><\/li>\r\n\r\n\r\n\r\n<li><b>Challenge<\/b><span style=\"font-weight: 400;\">: Cannot receive blood from O group donors; can only accept from other Bombay group individuals<\/span><\/li>\r\n\r\n\r\n\r\n<li><b>First discovered<\/b><span style=\"font-weight: 400;\">: In Mumbai, 1952 \u2014 hence the name.<\/span><span style=\"font-weight: 400;\"><br \/><\/span><\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\"><b>2. Rh-null (Golden Blood)<\/b><\/h3>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li><b>Prevalence<\/b><span style=\"font-weight: 400;\">: Fewer than 50 people reported worldwide; extremely rare in India.<\/span><\/li>\r\n\r\n\r\n\r\n<li><b>Why it&#8217;s rare<\/b><span style=\"font-weight: 400;\">: Completely lacks all Rh antigens (D, C, c, E, e).<\/span><\/li>\r\n\r\n\r\n\r\n<li><b>Challenge<\/b><span style=\"font-weight: 400;\">: Can donate to anyone with Rh system issues, but can only receive from another Rh-null donor<\/span><\/li>\r\n\r\n\r\n\r\n<li><b>Nickname<\/b><span style=\"font-weight: 400;\">: Called \u201cGolden Blood\u201d due to its life-saving potential and scarcity.<\/span><\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<p><b>3. In(a+b\u2212) \/ In(b\u2212) Phenotype<\/b><\/p>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li><b>Prevalence<\/b><span style=\"font-weight: 400;\">: Very rare; found in the african descent<\/span><\/li>\r\n\r\n\r\n\r\n<li><b>Why it\u2019s rare<\/b><span style=\"font-weight: 400;\">: Lacks the In(b) antigen<\/span><span style=\"font-weight: 400;\"><br \/><\/span><\/li>\r\n\r\n\r\n\r\n<li><b>Challenge<\/b><span style=\"font-weight: 400;\">: Alloantibodies can form during transfusion, making it dangerous to receive mismatched blood.<\/span><\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\"><b>4. Kell (K\u2212k\u2212)<\/b><\/h3>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li><b>Prevalence<\/b><span style=\"font-weight: 400;\">: Extremely rare globally; cases noted in the <\/span><span style=\"font-weight: 400;\">Europeans, Japanese, Africans, and Indians<\/span> <span style=\"font-weight: 400;\">population<\/span><\/li>\r\n\r\n\r\n\r\n<li><b>Why it&#8217;s rare<\/b><span style=\"font-weight: 400;\">: Lacks both K (Kell) and k (Cellano) antigens.<\/span><\/li>\r\n\r\n\r\n\r\n<li><b>Challenge<\/b><span style=\"font-weight: 400;\">: Kell antibodies can cause severe hemolytic reactions or hemolytic disease of the newborn (HDN).<\/span><span style=\"font-weight: 400;\"><br \/><\/span><\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\"><b>5. Diego Blood Group (Di(a\u2212b\u2212))<\/b><\/h3>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li><b>Prevalence<\/b><span style=\"font-weight: 400;\">: Extremely rare in India; more common in Native American and East Asian populations.<\/span><\/li>\r\n\r\n\r\n\r\n<li><b>Why it&#8217;s rare<\/b><span style=\"font-weight: 400;\">: Lacks Diego system antigens.<\/span><span style=\"font-weight: 400;\"><br \/><\/span><\/li>\r\n\r\n\r\n\r\n<li><b>Challenge<\/b><span style=\"font-weight: 400;\">: Alloimmunization can occur if misdiagnosed, leading to transfusion complications.<\/span><span style=\"font-weight: 400;\"><br \/><\/span><\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\"><b>6. Duffy Negative (Fy(a\u2212b\u2212))<\/b><\/h3>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li><b>Prevalence<\/b><span style=\"font-weight: 400;\">: More common in people of African descent; very rare in India.<\/span><span style=\"font-weight: 400;\"><br \/><\/span><\/li>\r\n\r\n\r\n\r\n<li><b>Why it\u2019s rare<\/b><span style=\"font-weight: 400;\">: Absence of Duffy antigens.<\/span><span style=\"font-weight: 400;\"><br \/><\/span><\/li>\r\n\r\n\r\n\r\n<li><b>Challenge<\/b><span style=\"font-weight: 400;\">: Sometimes resistant to certain types of malaria, but rare donors for transfusion purposes.<\/span><span style=\"font-weight: 400;\"><br \/><\/span><\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\"><b>7. MNS System Variants<\/b><\/h3>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li><b>Prevalence<\/b><span style=\"font-weight: 400;\">: Rare M+N\u2212S\u2212s\u2212 or other combinations have been found in isolated South East-Asian Countries<\/span><span style=\"font-weight: 400;\"><br \/><\/span><\/li>\r\n\r\n\r\n\r\n<li><b>Why it\u2019s rare<\/b><span style=\"font-weight: 400;\">: Variants in the MNS system are highly individual-specific.<\/span><span style=\"font-weight: 400;\"><br \/><\/span><\/li>\r\n\r\n\r\n\r\n<li><b>Challenge<\/b><span style=\"font-weight: 400;\">: Cross-matching is difficult; advanced typing needed before transfusion.<\/span><span style=\"font-weight: 400;\"><br \/><\/span><\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\"><b>India Makes Global Headlines with Discovery of New Blood Group \u2018CRIB\u2019 in Karnataka Woman<\/b><\/h2>\r\n\r\n\r\n\r\n<p><span style=\"font-weight: 400;\">In a historic advancement for medical science, a <\/span>new blood group antigen<span style=\"font-weight: 400;\"> has been discovered in <\/span>a 38-year-old woman from Kolar, Karnataka<span style=\"font-weight: 400;\">, making her the first person in the world known to carry this unique antigen. The discovery, which holds international importance, took place after the woman was admitted for a <\/span>cardiac procedure<span style=\"font-weight: 400;\"> and standard blood transfusion protocols failed due to unexplained incompatibility\u2014even with universally compatible <\/span>O Rh-positive blood<span style=\"font-weight: 400;\">.<\/span><\/p>\r\n\r\n\r\n\r\n<p><span style=\"font-weight: 400;\">The rare case was first examined at the <\/span>Rotary Bangalore TTK Blood Centre<span style=\"font-weight: 400;\"> and later escalated to the <\/span>International Blood Group Reference Laboratory (IBGRL) in the UK<span style=\"font-weight: 400;\">. Following extensive testing over several months, a previously unidentified antigen in the <\/span><b>Cromer blood group system<\/b><span style=\"font-weight: 400;\"> was revealed. It has now been officially named <\/span><a href=\"https:\/\/economictimes.indiatimes.com\/news\/new-updates\/india-discovers-worlds-rarest-blood-group-crib-in-bengaluru-woman-what-it-is-and-why-its-so-unique\/articleshow\/123022316.cms?from=mdr\"><b>CRIB<\/b><\/a><span style=\"font-weight: 400;\">, symbolizing its origin: <\/span><b>Cromer (CR), India (I), and Bangalore (B).<\/b><\/p>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\"><b>The Case That Challenged Medical Norms<\/b><\/h2>\r\n\r\n\r\n\r\n<p>Initially classified as O Rh-positive, the woman required a routine blood transfusion before surgery. But her blood was found to be incompatible with all available O+ donor units, which shocked the medical team. Suspecting an underlying rare immunohematological factor, the hospital referred the case to the Advanced Immunohematology Reference Laboratory at Rotary Bangalore TTK.<\/p>\r\n\r\n\r\n\r\n<p>Her blood reacted with every donor sample they tested\u2014a condition known as panreactivity. Despite testing 20 of her close relatives, not a single match was found.<\/p>\r\n\r\n\r\n\r\n<p><span style=\"font-weight: 400;\">Remarkably, doctors managed to proceed with the <\/span>cardiac surgery without transfusion, ensuring her safety while they sought answers. Her blood samples were then sent to IBGRL in Bristol, one of the world\u2019s top rare blood research centers.<\/p>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\"><b>A New Antigen is Born: CRIB<\/b><\/h2>\r\n\r\n\r\n\r\n<p>After nearly ten months of research and molecular analysis, scientists confirmed the presence of a completely new antigen within the Cromer blood group system. Named CRIB, this antigen is now officially recognized in international transfusion science, with the name reflecting the location and significance of the discovery.<\/p>\r\n\r\n\r\n\r\n<p><span style=\"font-weight: 400;\">The finding was formally presented at the <\/span><b>35th Regional Congress of the <a href=\"https:\/\/www.isbtweb.org\/\">International Society of Blood Transfusion (ISBT)<\/a><\/b><span style=\"font-weight: 400;\"> in <\/span><b>Milan, Italy<\/b><span style=\"font-weight: 400;\">, in <\/span><b>June 2025<\/b><span style=\"font-weight: 400;\">, placing India on the global map for rare blood group innovations.<\/span><\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\"><b>A Major Leap for India in Rare Blood Group Research<\/b><\/h3>\r\n\r\n\r\n\r\n<p>To address the urgent need for rare blood matching, the Rotary Bangalore TTK Blood Centre has now launched a dedicated Rare Donor Registry in association with:<\/p>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li><a href=\"https:\/\/ksaps.karnataka.gov.in\/info-2\/Blood+Transfusion+Services\/en\"><b>Karnataka State Blood Transfusion Council<\/b><\/a><\/li>\r\n\r\n\r\n\r\n<li><b>ICMR\u2013National Institute of Immunohaematology (Mumbai)<\/b><\/li>\r\n\r\n\r\n\r\n<li><b>International Society of Blood Transfusion (ISBT)<\/b><\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\"><b>The Role of Rare Donor Registries<\/b><\/h2>\r\n\r\n\r\n\r\n<p>A rare blood donor registry is a centralized database of people who are willing to donate rare blood types. It allows healthcare systems to:<\/p>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li><span style=\"font-weight: 400;\">Match rare blood recipients with potential donors quickly<\/span><\/li>\r\n\r\n\r\n\r\n<li><span style=\"font-weight: 400;\">Maintain a ready list of frozen blood units for emergencies<\/span><span style=\"font-weight: 400;\"><br \/><\/span><\/li>\r\n\r\n\r\n\r\n<li><span style=\"font-weight: 400;\">Coordinate with international networks when needed<\/span><span style=\"font-weight: 400;\"><br \/><\/span><\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<p><span style=\"font-weight: 400;\">India currently has efforts underway through:<\/span><\/p>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li><span style=\"font-weight: 400;\">National Institute of Immunohaematology (Mumbai)<\/span><\/li>\r\n\r\n\r\n\r\n<li><span style=\"font-weight: 400;\">Indian Red Cross Society (regional branches)<\/span><span style=\"font-weight: 400;\"><br \/><\/span><\/li>\r\n\r\n\r\n\r\n<li><span style=\"font-weight: 400;\">Select private blood banks and hospitals<\/span><span style=\"font-weight: 400;\"><br \/><\/span><\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<p>However, a national-level integrated registry is the need of the hour.<\/p>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\"><b>How You Can Help<\/b><\/h2>\r\n\r\n\r\n\r\n<ol class=\"wp-block-list\">\r\n<li><b>Get Tested Beyond ABO and Rh:<\/b><b><br \/><\/b><span style=\"font-weight: 400;\"> Ask for extended phenotyping when donating blood or during health checkups. You might discover you belong to a rare group.<\/span><span style=\"font-weight: 400;\"><br \/><br \/><\/span><\/li>\r\n\r\n\r\n\r\n<li><b>Register as a Donor:<\/b><b><br \/><\/b><span style=\"font-weight: 400;\"> If you have a rare blood group, register with a reliable rare blood donor organization or blood bank.<\/span><span style=\"font-weight: 400;\"><br \/><br \/><\/span><\/li>\r\n\r\n\r\n\r\n<li><b>Donate Regularly:<\/b><b><br \/><\/b><span style=\"font-weight: 400;\"> Stay healthy and committed to donating blood. A single donation can save multiple lives.<\/span><span style=\"font-weight: 400;\"><br \/><br \/><\/span><\/li>\r\n\r\n\r\n\r\n<li><b>Spread Awareness:<\/b><b><br \/><\/b><span style=\"font-weight: 400;\"> Talk about rare blood groups in your community, especially if you\u2019re in a region with high prevalence like Maharashtra or Karnataka.<\/span><span style=\"font-weight: 400;\"><br \/><br \/><\/span><\/li>\r\n\r\n\r\n\r\n<li><b>Support Blood Donation Drives:<\/b><b><br \/><\/b><span style=\"font-weight: 400;\"> Encourage your workplace, college, or community to host regular blood camps with extended blood group testing.<\/span><span style=\"font-weight: 400;\"><br \/><\/span><\/li>\r\n<\/ol>\r\n\r\n\r\n\r\n<p><span style=\"font-weight: 400;\">Rare blood groups may be uncommon, but their impact is profound. In a country like India, where population diversity is vast and medical infrastructure is still developing in rural areas, the need for awareness, proper testing, and a reliable donor network is urgent.<\/span><\/p>\r\n\r\n\r\n\r\n<p><span style=\"font-weight: 400;\">By understanding and supporting rare blood group initiatives, <\/span><b>we can build a safety net that saves lives \u2014 even the rarest ones<\/b><span style=\"font-weight: 400;\">.<\/span><\/p>\r\n","protected":false},"excerpt":{"rendered":"<p>Rare blood groups in India are a lesser-known but critical aspect of our healthcare system. While most of us are familiar with common blood types<\/p>\n","protected":false},"author":2,"featured_media":7662,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12,16],"tags":[1452,1448,1453,1450,1451,1447,1455,1454,1460,1458,1459,1457,1442,1461,1445,1449,1446,1443,1444,1456],"class_list":["post-7661","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-information","category-well-being","tag-a-negative-blood","tag-a-positive-blood","tag-ab-negative-blood","tag-ab-positive-blood","tag-b-negative-blood","tag-b-positive-blood","tag-bombay-blood-group","tag-common-blood-groups-in-india","tag-crib","tag-diego-blood-group","tag-duffy-negative","tag-kell-blood-group","tag-new-blood-group","tag-new-blood-group-crib-in-karnataka","tag-new-blood-group-found-in-bangalore","tag-o-negative-blood","tag-o-positive-blood","tag-rare-blood-group","tag-rare-blood-group-in-india","tag-rh-null-blood-group"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.6 - 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