My own experience
Over many years, I found that when I am close to a source of WiFi (phone or router) my eyes hurt, particularly my left eye.ย I was not aware of others having that particular experience until I came across this research paper which shows that the intra-occular pressure in people with glaucoma is significantly increased by Electromagnetic Fields (EMFs) from mobile phone use.ย I have glaucoma in my left eye.ย
My personal ongoing experience leads me to conclude that there is definitely an effect on biological systems. ย In 2011 the World Health Organization (WHO) classified radiofrequency electromagnetic fields as possibly carcinogenic to humans (Group 2B).
State of research
To determine the current (May 2023) state of research into this area I asked ChatGPT.
Me: “Is there research that shows that WiFi has a negative biological effect?”
ChatGPT: “Some studies have suggested that exposure to Wi-Fi and other EMFs may have negative biological effects, such as:
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DNA damage: Some studies have found that exposure to Wi-Fi radiation can cause DNA damage, which could potentially lead to cancer.
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Increased oxidative stress: EMFs have been shown to increase oxidative stress in cells, which can damage cell membranes, proteins, and DNA.
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Changes in brain function: Some studies have found that exposure to EMFs, including Wi-Fi, can affect brain function and behavior, including memory, attention, and mood.
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Increased risk of cancer: While there is still much debate on this topic, some studies have suggested that long-term exposure to Wi-Fi and other EMFs may increase the risk of certain types of cancer, such as brain cancer and leukemia.
However, it is important to note that the evidence on the potential biological effects of Wi-Fi and other EMFs is still inconclusive, and there is ongoing debate among scientists and experts in the field.”
Examples
Jeromy Johnson was an engineer in Silicon Valley who became electrosensitive and has created a very useful online Research page on some of the research into these effects.
WiFi
The issues with WiFi are well covered in WiFiInSchools.org.uk.
Mobile Phones
The issues with 4G and 5G signals can be found in this article at ElectricSense.com.
In order to minimise the effects of EMFs from mobile phone, a web search for “emf blocking phone cases” will show who sell these covers.ย For example, the RF-Safe website has both case-studies and sell protective cases for phones.ย I personally use these, but there are many others.