Throughout the world, governments and NGOs are some of the largest collectors and aggregators of information about public health. They also often publish analyses of public health data. These publications aren't considered to be scholarly, because they aren't peer reviewed, but they are considered to be reputable. Your professors may sometimes ask you to find or consult a government source, and the ones listed on this page are good places to start. If you are looking specifically for public health data or statistics, consult the library's guide on Health Data and Statistics.