Gwada Negative

Gwada negative is the informal name given to the newly classified EMM-negative blood group system, officially registered by ISBT as ISBT042. Read more about Gwada Negative, Key Facts, Latest News

Gwada negative

Gwada Negative Latest News

Recently, France’s national blood agency, the French Blood Establishment (EFS) has identified a completely new blood group system dubbed as “Gwada negative” which is officially recognised by the International Society of Blood Transfusion (ISBT).   

About Gwada Negative

  • It is named EMM-negative and colloquially dubbed “Gwada negative” in reference to the Guadeloupean origin of the woman who carries it.
  • It is the informal name given to the newly classified EMM-negative blood group system, officially registered by ISBT as ISBT042.
  • It is defined by the absence of the EMM antigen, which is normally found on red blood cells and is considered a high-incidence antigen.
  • High-incidence antigens are present in nearly all humans but lacking in this new system which is extremely rare and medically significant.
  • Criteria to consider a new blood group a new system: It should be genetically determined, inherited, identifiable via serological or molecular techniques, and have an associated antibody — criteria that EMM-negative meets.
  • The identification of the EMM-negative blood type adds to the previously known 47 blood group systems, making it the 48th globally recognised system in transfusion science.
  • As of now, the woman from Guadeloupe is the only known person in the world to possess this blood type.
  • Her case is especially unique because she inherited the mutated gene from both her mother and her father, each of whom likely carried a single copy of the rare gene variant. This dual inheritance led to a complete lack of the EMM antigen in her red blood cells.

Key Facts about International Society of Blood Transfusion

  • It was founded in 1935 in Paris.
  • Headquarter: Amsterdam
  • Functions: It aids in the solution of scientific and practical problems in blood transfusion and also facilitates the development of closer ties among those concerned with such problems, and to promote standardization of methods, equipment, and norms for its field.

Source: TH

Latest UPSC Exam 2025 Updates

Last updated on July, 2025

UPSC Notification 2025 was released on 22nd January 2025.

UPSC Prelims Result 2025 is out now for the CSE held on 25 May 2025.

UPSC Prelims Question Paper 2025 and Unofficial Prelims Answer Key 2025  are available now.

UPSC Calendar 2026 is released on 15th May, 2025.

→ The UPSC Vacancy 2025 were released 1129, out of which 979 were for UPSC CSE and remaining 150 are for UPSC IFoS.

UPSC Mains 2025 will be conducted on 22nd August 2025.

UPSC Prelims 2026 will be conducted on 24th May, 2026 & UPSC Mains 2026 will be conducted on 21st August 2026.

→ The UPSC Selection Process is of 3 stages-Prelims, Mains and Interview.

UPSC Result 2024 is released with latest UPSC Marksheet 2024. Check Now!

UPSC Toppers List 2024 is released now. Shakti Dubey is UPSC AIR 1 2024 Topper.

→ Also check Best IAS Coaching in Delhi

Gwada negative FAQs

Q1. What is m-antigen?+

Q2. What is Blood Transfusion?+

Tags: gwada negative Prelims Pointers upsc current affairs upsc prelims current affairs

Vajiram Editor
Vajiram Editor
At Vajiram & Ravi, our team includes subject experts who have appeared for the UPSC Mains and the Interview stage. With their deep understanding of the exam, they create content that is clear, to the point, reliable, and helpful for aspirants.Their aim is to make even difficult topics easy to understand and directly useful for your UPSC preparation—whether it’s for Current Affairs, General Studies, or Optional subjects. Every note, article, or test is designed to save your time and boost your performance.
UPSC GS Course 2026
UPSC GS Course 2026
₹1,75,000
Enroll Now
GS Foundation Course 2 Yrs
GS Foundation Course 2 Yrs
₹2,45,000
Enroll Now
Prelims PowerupTest Series
Prelims PowerupTest Series
₹13000
Enroll Now
UPSC Mains Test Series
UPSC Mains Test Series
₹16000
Enroll Now
UPSC Mentorship Program
UPSC Mentorship Program
₹85000
Enroll Now
Enquire Now