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 spreads disease, 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 spanning low, mid, and high frequency bands, with the highest reaching roughly 100 GHz. These are non-ionizing radiations, meaning they lack the energy to break chemical bonds or damage DNA directly, which is the principal mechanism by which ionizing radiation such as X-rays or gamma rays causes cancer. This distinction is central to why major health bodies do not treat 5G as comparable in risk to ionizing sources.
The International Commission on Non-Ionizing Radiation Protection (ICNIRP), recognized by WHO as the international authority on non-ionizing radiation, updated its RF exposure guidelines in 2020 specifically to address 5G frequencies. ICNIRP concludes that 5G exposures will not cause harm provided they remain within its guidelines, which include large safety margins below the level at which measurable tissue heating occurs. WHO states that, to date, no adverse health effect has been causally linked to exposure from wireless technologies operating within these limits, and that tissue heating remains the only well-established interaction mechanism at relevant exposure levels.
A 2021 peer-reviewed review in Environmental Health covering RF fields above 6 GHz, the range used by parts of 5G infrastructure, found no confirmed evidence of health hazards from low-level exposure. Separately, studies on people who self-identify with electromagnetic hypersensitivity have consistently found no objective physiological effect from RF exposure under blinded, placebo-controlled conditions, indicating that reported symptoms are not reliably triggered by the presence of RF fields themselves.
Some independent researchers and a minority of scientists argue that existing safety standards focus mainly on acute thermal effects and may not fully capture possible non-thermal biological effects from long-term, lower-intensity exposure. These are legitimate open questions and an active area of research, but they have not yet produced replicated evidence of harm at guideline-compliant exposure levels experienced by the general public. Conspiracy-level claims that arose during the COVID-19 pandemic, including that 5G towers spread the virus or that 5G functions as a government mind-control tool, have no scientific foundation and were investigated and rejected by telecommunications regulators and public health agencies worldwide. Distinguishing between this legitimate scientific caution and the unfounded conspiracy claims is important for public understanding of the topic.
Public anxiety about new wireless generations has a long history: similar fears circulated around 2G and 3G networks in earlier decades and did not withstand subsequent research. Large national cancer registries that have tracked brain tumor incidence throughout the rollout of successive mobile network generations, including 5G, have not shown incidence trends consistent with a new widespread carcinogenic exposure. Regulatory agencies in the European Union, United Kingdom, Australia, and United States all apply exposure limits calibrated with substantial safety margins below the threshold for measurable biological effects, and 5G base stations and devices are required to comply with these limits before they can be sold or deployed.
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