Should You Worry About Radiation?

I used to make and test antenna radiation more than 20 years ago but now I'm working in different field. Recently my colleague raised concern about radiation and it reminded me about radiation effect of devices and what I learnt many years ago. 

I prefer to use network cable instead of Wi-Fi signal to access internet as it can helps to reduce radiation exposure. When you are using the phone, it has more radiated power. If you are concerned about the effect of radiation, you can buy anti-radiation devices. In this video, the host also test the effectiveness of various RF shield devices. 

The World Health Organisation (WHO) safety limit on radiation is 10 Watts per meter square. However is this limit really safe? 

In France, labels and cell phones come with warning about radiation as well as instructions to keep devices away from the abdomen of pregnant women. A child's head has a thinner skull. A child's skull can absorb 10 times more radiation. It would be best to limit usage of mobile devices like handphone and tablet to minimum use for child. Instead of using wireless bluetooth earphones, it is best to use wired earphones.

Image from above CNA video.

In France, they already have guidelines and instructions to keep the device away from the abdomen of pregnant women and young children.