The Johns Hopkins School of Public Health Department of Biochemistry and Molecular Biology (BMB) was established in 1916, as the Department of Chemical Hygiene.  That same year, the Johns Hopkins School of Hygiene and Public Health was founded, as it was named then. Today, the school is named the Bloomberg School of Public Health and is part of the Johns Hopkins University in Baltimore, Maryland, United States.
The Department has changed names three times in its history from the Department of Chemical Hygiene, when it was founded, to the Department of Biochemistry by the time Roger H. Herriott was its Chair in 1948, to the Department of Biochemistry and Molecular Biology by the time Roger McMacken was its chair in 1990. Yet, since that time it has remained as the Department of Biochemistry and Molecular Biology.
As of 2019, BMB is chaired by Ashani Weeraratna.