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Alexander S. Wiener

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Alexander Solomon Wiener was a scientist who studied the secrets of blood. He was a doctor and a biologist from New York. His work helped people understand how blood works in our bodies. This knowledge was very important for medicine and for solving crimes. He looked at blood like a special fingerprint. This helped doctors keep people safe during medical tests.

One of his biggest jobs was studying blood factors. A factor is a specific part of the blood. In 1937, Wiener and Karl Landsteiner found the Rh factor. They named it after rhesus monkeys used in their tests. Wiener realized this factor could be very dangerous. If a person gets the wrong type of blood, their body makes antibodies. These antibodies are like tiny guards that fight the new blood. This makes blood transfusions much safer for everyone.

Wiener also helped save many newborn babies. Some babies suffer from a disease called erythroblastosis fetalis. This happens because of how the mother and baby's blood interact. In 1946, Wiener created a new way to help. He called this method an exchange transfusion. It is a process where a baby gets new blood. This simple idea saved over 200,000 lives.

Many people used Wiener's work to help the police. He worked with the Chief Medical Examiner in New York City. He used blood to find clues in legal cases. This kind of work is called forensics. He even helped write new laws about blood testing. His father, George Wiener, was a lawyer who helped him. They wanted to make sure science was used correctly in court.

Later in his life, Wiener studied how blood traits pass to children. This study is called genetics. He had big ideas about how one gene can have many different forms. This was a new way of thinking at the time. Even though other scientists had different theories, his ideas were very close to the truth. He won the Lasker Award in 1946 for his great work. He lived a life full of math, music, and science.

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