Quantitative data, statistics, infographics, and related information compiled from market research institutes, trade publications, scientific journals, and government databases. Please note: To access the eCommerce Insights module within Statista, click Insights > Explore eCommerce Insights and then click Login from at the top right of the screen.
There is a lot of data out there, some of it easily findable and freely available via search engines, such as Google. Does that mean you can't use it? Not necessarily. Ask yourself a few questions as you look for and then evaluate the data.
Below are some categories of who and why.
If the data you find helps answer your question, make a point and it meets one of the criteria above, it's should be OK to use. When in doubt, ask your professor!
For more information on finding health numbers, this section on Finding Health Statistics from the NIH/National Library of Medicine may be helpful