In this booklet you will learn more about the role vaccines play in keeping them healthy. You will learn about: Diseases that are prevented by vaccines, and the vaccines that prevent them. -- How to prepare for a doctor's visit that includes vaccinations, and what to expect during and after the visit. -- How vaccines help your child's immune system do its job. -- How well vaccines work, and how safe they are. -- Where to find more information.

Traces the development of the sanitary and health problems of New York City from earliest Dutch times to the culmination of a nineteenth-century reform movement that produced the Metropolitan Health Act of 1866, the forerunner of the present New York City Department of Health. Professor Duffy shows the city's transition from a clean and healthy colonial settlement to an epidemic-ridden community in the eighteenth century, as the city outgrew its health and sanitation facilities. He describes the slow growth of a demand for adequate health laws in the mid-nineteenth century, leading to the establishment of the first permanent health agency in 1866.

New York City's municipal water supply system provides about 1 billion gallons of drinking water a day to over 8.5 million people in New York City and about 1 million people living in nearby Westchester, Putnam, Ulster, and Orange counties. The combined water supply system includes 19 reservoirs and three controlled lakes with a total storage capacity of approximately 580 billion gallons. The city's Watershed Protection Program is intended to maintain and enhance the high quality of these surface water sources. Review of the New York City Watershed Protection Program assesses the efficacy and future of New York City's watershed management activities. The report identifies program areas that may require future change or action, including continued efforts to address turbidity and responding to changes in reservoir water quality as a result of climate change.