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Tells the story of the doctors and researchers who worked to track down the cause of yellow fever and find a way to eliminate the disease.

Written for young adults, the Urban Underground series confronts issues that are of great importance to teens, such as friendship, loyalty, drugs, gangs, abuse, urban blight, bullies and self-estee

Written for young adults, the Urban Underground series confronts issues that are of great importance to teens, such as friendship, loyalty, drugs, gangs, abuse, urban blight, bullies and self-estee

Written for young adults, the Urban Underground series confronts issues that are of great importance to teens, such as friendship, loyalty, drugs, gangs, abuse, urban blight, bullies and self-estee

Written for young adults, the Urban Underground series confronts issues that are of great importance to teens, such as friendship, loyalty, drugs, gangs, abuse, urban blight, bullies and self-estee

Written for young adults, the Urban Underground series confronts issues that are of great importance to teens, such as friendship, loyalty, drugs, gangs, abuse, urban blight, bullies and self-estee

Written for young adults, the Urban Underground series confronts issues that are of great importance to teens, such as friendship, loyalty, drugs, gangs, abuse, urban blight, bullies and self-estee

Written for young adults, the Urban Underground series confronts issues that are of great importance to teens, such as friendship, loyalty, drugs, gangs, abuse, urban blight, bullies and self-estee

Written for young adults, the Urban Underground series confronts issues that are of great importance to teens, such as friendship, loyalty, drugs, gangs, abuse, urban blight, bullies and self-estee

Written for young adults, the Urban Underground series confronts issues that are of great importance to teens, such as friendship, loyalty, drugs, gangs, abuse, urban blight, bullies and self-estee

Written for young adults, the Urban Underground series confronts issues that are of great importance to teens, such as friendship, loyalty, drugs, gangs, abuse, urban blight, bullies and self-estee

Written for young adults, the Urban Underground series confronts issues that are of great importance to teens, such as friendship, loyalty, drugs, gangs, abuse, urban blight, bullies and self-estee

Written for young adults, the Urban Underground series confronts issues that are of great importance to teens, such as friendship, loyalty, drugs, gangs, abuse, urban blight, bullies and self-estee

Written for young adults, the Urban Underground series confronts issues that are of great importance to teens, such as friendship, loyalty, drugs, gangs, abuse, urban blight, bullies and self-estee

Written for young adults, the Urban Underground series confronts issues that are of great importance to teens, such as friendship, loyalty, drugs, gangs, abuse, urban blight, bullies and self-estee