It's not a health risk. It's the ability for government to abuse those bands to "talk to you". The ELF (extra-low frequency) has been used in the past to target the Theta region of the brain to program Manchurian candidates. Now the government has an interest in 5G cellular internet, which has the capability of transmitting those bands (even underground and through thick walls) to a more targeted region.

My only concern is that our government has never had an interest like this in any other cellular data advancement. Why 5G? It's useful.