A parasite that causes malaria is halted by sickle cells and makes people who carry the sickle cell trait more resistant to the disease. This is why sickle cell trait also occurs more in people who live in tropical and sub-tropical regions where cases of malaria were or still is common. It comes from the copy of an abnormal sickle or the HBB gene and one copy of the normal HBB gene. The gene is an evolutionary response to malaria, where humans begin to develop an abnormal HBB gene and pass it onto to the next generation. The "Black Disease"The earliest documentation of sickle cell symptoms in medical texts could be found from the 1870s. However, it had not been formally identified until in 1910. when the first case was detected in the United States. The first case of sickle cell disease or SCD in the US was in 1904, when Walter Clement Noel, a 20-year-old dental student from Grenada, sought care for anemia at Chicago Presbyterian Hospital, where he met Dr James B Herrick. Dr Herrick was a cardiologist and professor of medicine and he was assigned noel who had experienced recurrent episodes of "muscular rheumatism" and "bilious attacks" over a period of 3 years. This case was assigned to an intern Dr Ernest E Irons by Dr Herrick. Dr Ernest performed initial blood work on Noel and observed the unusual sickle-shaped red blood cells in the sample under the microscope. This is when Dr Herrick was told about it, leading to him publishing the first documented case study of SCD, titled, "Peculiar Elongated and Sickle-Shaped Red Blood Corpuscles in a Case of Severe Anemia."However, the name, sickle cell anemia, was not coined until in 1922, by Vernon Mason. It was also the first diagnosed genetic disease and the first to be linked to the hemoglobin protein.But, how did it gain the name "Black Disease"? This is because the disease often disproportionately affected Black Americans in the US, which caused racial bias and prevented people with sickle cell from receiving quality care. In response to this, in the 1960s, the Black Panther Party worked to expand community-based care for education and treatment of this disease. This was part of their initiative to tackle the sickle cell, which received little to no attention because it mostly affected a large part of Black community. While Herrick may have described the first known case in the US, SCD did exist for generations in African and Mediterranean descent, due to the regions being prone to diseases like malaria. In African medical literature, it was known as "ogbanjes", which loosely translated into "children who come and go" as the infants born with this disease had a high mortality rates. One of the first records, as is also noted by the Sickle Cell Association from Africa is from a Ghanian family in 1670.A Groundbreaking DiscoveryIn 1927, scientists Hahn and Gillespie made a discovery that reshaped our understanding of blood disorders. While studying red blood cells in a low-oxygen environment saturated with carbon dioxide, they observed a curious phenomenon: the cells twisted into sickle shapes—not just in patients with sickle cell disease (SCD), but sometimes in people without any symptoms at all. This puzzling observation hinted at an invisible carrier state and eventually led to the identification of what we now call the sickle cell trait. Fast-forward to the late 1940s and early 1950s, and the pieces of the puzzle began falling into place. In 1949, two scientists working continents apart independently uncovered the genetic blueprint of SCD. Col. E. A. Beet, a military physician stationed in what is now Mozambique, published his findings in an African medical journal. Around the same time, Dr. James V. Neel at the University of Michigan released a parallel study in the journal Science. Both revealed that SCD follows an autosomal recessive inheritance pattern—meaning the disease only occurs when a person inherits two copies of the mutated gene. Those with just one copy? They carried the trait, but not the illness.Together, their work laid the foundation for our modern understanding of genetic inheritance and reshaped how we screen for and manage sickle cell disorders today.