Is 5G More Dangerous Than 4G? What Independent Science Says
5G is the fifth generation of mobile communications infrastructure, promising faster data speeds, lower latency, and greater network capacity. It is also generating more public concern about health effects than any previous technology transition in the telecommunications industry. The question is whether those concerns are scientifically grounded — and what, if anything, distinguishes 5G's risks from those of the 4G system it is extending.
Sub-6GHz 5G: Similar Frequencies, Denser Infrastructure
The 5G spectrum being deployed across UK cities in 2024–2025 is predominantly in the 3.4–3.8GHz range (n77/n78 bands). These frequencies are within the range covered by existing RF health research and are detected by standard RF meters including the Acoustimeter AM-11. The biological concern with sub-6GHz 5G is not primarily about the frequency — it is about infrastructure density.
5G's higher frequency range requires shorter range small cells to maintain coverage. Rather than one large mast per kilometre, 5G deployments require small cells every 100–300 metres — on lamp posts, building facades, and street furniture. In dense urban areas this creates a situation where large numbers of people live within 30–100 metres of active transmitters rather than at 500–1000 metre distances from masts. The inverse square law means that halving your distance to a transmitter quadruples your exposure. This structural shift significantly increases average population-level RF exposure regardless of individual transmitter output.
The 5G Appeal
The 5G Appeal was launched in 2017 and has been signed by 420+ scientists and medical doctors who have published peer-reviewed research on biological effects of EMF. Their key demand: a moratorium on 5G rollout until independent health research is completed. The appeal specifically notes: "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." The signatories include professors from Harvard, Stanford, Yale, and leading European universities.
mmWave 5G: A Novel Exposure Type
Millimetre wave 5G operates at frequencies that have essentially no civilian deployment history. At 24GHz and above, electromagnetic energy penetrates only 1–2mm into skin — meaning skin tissue and the cornea receive the full energy deposition rather than it being distributed through deeper tissue. The sweat ducts that perforate human skin may act as antennas for mmWave frequencies, creating locally concentrated absorption points.
Neufeld & Kuster (2018) published modelling showing that peak skin temperatures from planned mmWave 5G exposure scenarios could approach or exceed ICNIRP thermal thresholds under certain deployment configurations. This is a thermal concern — separate from the non-thermal biological effects that dominate the sub-6GHz research literature.
The Insurance Industry Signal
Swiss Re — one of the world's largest reinsurance companies — placed potential health liability from 5G and mmWave radiation in its "high impact, high uncertainty" risk category in its 2019 SONAR emerging risk report. Insurance companies are professional risk assessors with no ideological stake in the EMF debate; their placement of 5G health liability in the highest risk category is a significant signal that the scientific uncertainty around 5G health effects is real and financially material.
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References
All research cited on this page is drawn from peer-reviewed journals, government agency publications, or formal scientific appeals. EMF Defender presents independent research findings; this page does not constitute medical advice. For health decisions, consult a qualified practitioner familiar with environmental medicine.
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Frequently Asked Questions
5G in the UK and Europe is primarily deployed in two frequency ranges: sub-6GHz (particularly the 3.4–3.8GHz band, known as the n77/n78 bands) and millimetre wave (mmWave, 24–100GHz). Sub-6GHz 5G uses similar frequency ranges to existing 4G but with different modulation and denser infrastructure. mmWave 5G uses much higher frequencies that penetrate objects poorly but achieve very high data rates over short distances. The vast majority of UK outdoor 5G coverage is sub-6GHz; mmWave is used only in specific indoor venues and dense urban hotspots.
This is one of the most significant concerns raised by independent scientists. To date, no pre-deployment safety studies on 5G radiation specifically have been published in the independent scientific literature. The safety assumptions for 5G are extrapolated from research conducted on 2G, 3G, and 4G systems — using different frequencies, different modulation patterns, and different deployment models. The 5G Appeal, signed by 420+ scientists and medical doctors, explicitly calls for a moratorium on 5G infrastructure expansion until independent health research specific to 5G is completed and reviewed.
Yes — this is one of the most important structural differences between 5G and previous generations. Sub-6GHz 5G achieves its performance targets by deploying many more small cells at street level, typically on lamp posts, building facades, and utility poles — at distances of 100–300 metres apart rather than the kilometre-scale spacing of 4G masts. This dramatically increases the number of people living in very close proximity to active transmitters. While each individual small cell may output lower power than a 4G mast, the cumulative population exposure from a dense urban small cell network is higher, not lower, than from widely-spaced 4G masts.
Millimetre wave frequencies (24GHz and above) have never been deployed in the civilian RF environment at population scale before. At these frequencies, energy penetrates only to the outer layers of skin and the cornea — tissues that contain dense populations of nerve endings, sweat gland openings, and stem cells. Neufeld & Kuster (2018) modelled mmWave absorption and found that the existing ICNIRP guidelines may be insufficient to prevent skin and nerve heating effects at planned deployment power levels. The insurance industry has also taken notice — Swiss Re, one of the world's largest reinsurers, placed 5G/mmWave health liability in its 'high' risk category in 2019.
The most effective steps: (1) Identify the location of 5G small cells near your home using Ofcom's Sitefinder database or equivalent. If there is one on a lamp post directly outside your bedroom window, that is worth acting on. (2) Use wired connections where possible and keep mobile devices at a distance. (3) Check whether your phone's 5G can be disabled in network settings — switching to 4G-only mode when not needing 5G data speeds reduces your handset's transmit power. (4) Consider EMF shielding for rooms facing known 5G infrastructure. (5) Use an RF meter to measure actual levels — concern should be proportional to measured exposure.