article thumbnail

Have smartphones and ubiquitous internet access affected sedentary time among children and adolescents?

International Journal of Epidemiology Blog

However, few countries have similar physical activity surveillance systems, and even fewer have data from before the 2007 advent of smartphones. Most current physical activity surveillance systems are therefore unlikely to fully capture real changes in human movement behaviour across the lifespan.

article thumbnail

The U.S. withdrawal from the WHO

Your Local Epidemiologist

Its scope is huge—everything from disease surveillance to mental health to non-communicable diseases. For disease surveillance: The WHO coordinates global surveillance system for diseases, like influenza and polio. Then, there is a scope problem. The result?