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Blood group is a trait which is determined by a person s DNA and depends on the versions of genes inherited from a person s parents.
These genes dictate the presence of antigens on the surface of red blood cells, the donut-shaped vessels which carry oxygen around the body in arteries and veins.
Antigens are protruding proteins and there are two versions, A and B, which are found on the surface of red blood cells, also known as erythrocytes.
Every person has either A, B, A and B, or none. These people will therefore have blood type A, B, AB and O, respectively, and this is known as the ABO blood group system.
Blood Type Doesn t Affect Your COVID Risk
By Dennis Thompson
HealthDay Reporter
MONDAY, April 5, 2021 (HealthDay News) A or B, AB or O, it doesn t matter your blood type has nothing to do with your risk of contracting severe COVID-19, a new study concludes.
Early in the pandemic, some reports suggested people with A-type blood were more susceptible to COVID, while those with O-type blood were less so.
But a review of nearly 108,000 patients in a three-state health network has found no link at all between blood type and COVID risk. Since the beginning of this pandemic, there have been associations postulated between blood type and disease susceptibility, said Dr. Amesh Adalja, a senior scholar with the Johns Hopkins Center for Health Security.