Both drugs had been previously recommended for approval 14-0 by members of FDA's Anti-Infective Drugs Advisory Committee. The significance of two new antibiotics in four weeks? We've recently been averaging one antibiotic every three years.
Skin color is due primarily to the presence of a pigment called melanin, which is controlled by at least 6 genes. Both light and dark complexioned people have melanin. However, two forms are produced--pheomelanin, which is red to yellow in color, and eumelanin, which is dark brown to black.
There are two different types of melanin, the pigment that allows skin to tan and that makes brown eyes brown. There is a dark, black melanin and a yellow melanin. An eye without melanin, either black or yellow will be blue. Green eyes are caused by low levels of black melanin and higher levels of the yellow melanin.