Researchers are reporting mass die offs of wild birds and sea mammals due to bird flu. They're tracking the deaths to better understand the virus and how it might create a greater threat to humans.
NPR's Ailsa Chang talks with Nancy Krieger, a social epidemiologist at Harvard University, about her efforts to preserve federal health data that recently disappeared from government websites.
In much of the U.S., illegal cannabis outcompetes legal weed sold in licensed shops. For consumers, it can be difficult to find regulated cannabis — but there are tips on how to do that.
NPR's Ailsa Chang talks with Nancy Krieger, a social epidemiologist at Harvard University, about her efforts to preserve federal health data that recently disappeared from government websites.