As of September 2019, 252 scientists from at least 43 different nations have signed this international EMF Scientists Appeal stating:

"Numerous recent scientific publications have shown that EMF affects living organisms at levels well below most international and national guidelines. Effects include increased cancer risk, cellular stress, increase in harmful free radicals, genetic damages, structural and functional changes of the reproductive system,  learning and memory deficits, neurological disorders, and negative impacts on general well-being in humans. Damage goes well beyond the human race, as there is growing evidence of harmful effects to both plant and animal life."

As of July 6, 2020, 393 scientists and medical doctors signed this 5G European Union Appeal (originally submitted in 2017) warning of potential severe health effects of 5G:

 ‘We the undersigned scientists and doctors recommend a moratorium on the roll‑out of the fifth generation, 5G, for telecommunication until potential hazards for human health and the environment have been fully investigated by scientists independent from industry. 5G will substantially increase exposure to radiofrequency electromagnetic fields (RF‑EMF) on top of the 2G, 3G, 4G, Wi‑Fi, etc. for telecommunications already in place. RF‑EMF has been proven to be harmful for humans and the environment."