One of my sisters and her husband live in Zambia, where they do public health work. Specifically, he works on malaria[1], and one of the greatest challenges he faces is field data collection. Enabling everyone with a compatible phone to send in data would, I'm sure, be incredibly valuable.
I'm bummed that there aren't any public health tools included in this app. Hopefully they'll consider adding something like that in the future.
FactsForLife is included, doesn't that count as a public health tool? Not sure what you mean specifically, but this appears to at least educate around a lot of health topics. http://www.factsforlifeglobal.org/
I can see the value of data collection too though, but I think for a person accessing the internet for the first time, they would be more interested in gaining information than sending data about themselves into the void.
It also has Zambia ureport (zambiaureport.org), The ureport application itself is an SMS Counselling platform+polling+campaigning. What facebook is making available are the Frequently Asked Questions and answers.
...Am the developer on Zambia U-Report if anyone has any questions.
I'm bummed that there aren't any public health tools included in this app. Hopefully they'll consider adding something like that in the future.
[1] Malaria affects almost 1/3 of the country's population annually: http://www.unicef.org/zambia/5109_8454.html