There are 2 links in the article for roll-out maps.
The roll-out will occur in dense urban areas.
There should be no difficulty in determining any negative health consequences.
Big question is...what will be done by the gov't, the Telecom companies and the public, if adverse health effects show up?
Once a specific area has 5G how many people will choose to go into that area?
Will tansit workers, delivery services refuse to go into 5G areas?
It will be important to note if any specific areas, like gov't offices, etc., prohibit 5G in their area.
I simply can't imagine people wanting 5G cell phones!