5G and human health
No adverse health effects have been causally linked to 5G radiofrequency exposure at levels within international safety guidelines. Extreme claims — such as that 5G causes cancer or spread COVID-19 — are without scientific basis, though some researchers call for continued monitoring of long-term non-thermal effects.
What we know
5G networks use radiofrequency (RF) electromagnetic fields in frequency ranges up to around 100 GHz. These are non-ionizing radiations, meaning they lack the energy to break chemical bonds or damage DNA directly — the principal mechanism by which ionizing radiation (like X-rays or gamma rays) causes cancer.
The International Commission on Non-Ionizing Radiation Protection (ICNIRP), recognized by WHO as the international authority on non-ionizing radiation, updated its RF guidelines in 2020 to specifically address 5G frequencies. ICNIRP concludes that 5G exposures will not cause any harm providing they adhere to its guidelines. WHO notes that to date, no adverse health effect has been causally linked to wireless technologies, and that tissue heating is the main interaction mechanism — which does not occur at levels far below the safety thresholds.
A 2021 peer-reviewed review in Environmental Health covering RF fields above 6 GHz (the frequencies used by parts of 5G) found no confirmed evidence of health hazards from low-level exposure. Studies on electromagnetic hypersensitivity have consistently found no objective physiological effect from RF exposure under blinded conditions.
Some independent researchers and a minority of scientists argue that existing safety standards focus only on acute thermal effects and may not adequately account for possible non-thermal biological effects at lower intensities over long exposures. These concerns are legitimate areas of ongoing research, though they have not produced replicated evidence of harm at guideline-compliant exposure levels. Conspiracy-level claims — including that 5G towers spread COVID-19, or that 5G is a government mind-control tool — have no scientific foundation.
Common claims
- 5G causes cancerNot supported — 5G uses non-ionizing radiation that does not damage DNA
- 5G spread COVID-19False — COVID-19 is a viral disease with no connection to radio waves
- 5G exposures are unsafe according to ICNIRPFalse — ICNIRP 2020 guidelines explicitly state 5G is safe within its guidelines
- Long-term non-thermal effects of RF are unknown and need more researchPartly true — research continues, but no harm has been demonstrated at safe exposure levels
Evidence hierarchy
All sources
- ICNIRP: 5G and healthInternational Commission on Non-Ionizing Radiation Protection · 2020
- Radiation: 5G mobile networks and healthWorld Health Organization · 2020
- 5G mobile networks and health — state of the sciencePubMed / Environmental Health · 2021
- Understanding the possible effects of 5G on our healthUK Research and Innovation (UKRI) · 2024