Securing the Supply Chain: How Blood Typing Safeguards Global Health
Before the advent of DNA testing, Blood Group Typing was one of the first methods used to determine paternity. While it could never definitively prove who a father was, it could be used to exclude a man from being the biological father. For example, if a mother has type O blood and her child has type B blood, the father must have at least one B allele. If a potential father has type O blood, he cannot be the father. This is due to the genetic principles of how blood types are inherited. However, this method is limited because many people share the same blood type. With the rise of highly accurate and reliable DNA testing, blood typing is no longer the primary method for paternity cases, but its historical role in forensic and legal science remains a significant part of its legacy.