While the IARC classified RF-emf computer shield exposure as Group 2B (possibly carcinogenic for humans) There isn't a standardized safety limit that can be regarded as universally acceptable. Additionally it is crucial to be aware that safety guidelines differ widely across the globe. In addition, there is the issue of conflicts of interests. As more cities embrace 5G technology, increasing numbers of users are being exposed to these frequencies than ever before.

IARC classification of RF-EMF exposure in the Group 2B (possibly carcinogenic for humans)
The IARC (International Agency for Research on Cancer) has classified RF-EMF exposure as a Group 2b (possibly carcinogenic for humans). This classification implies that further investigation is required. However the IARC used a relatively small amount of evidence only a handful of cases-control studies to arrive at their conclusion.

While some studies have suggested EMFs from radiofrequency may cause cancer, others have not found evidence that suggests the possibility of causing disease in humans. It is worth noting that the International EMF Project, which was started in 1996, did not publish its findings, thus this classification is not definitive.

IARC safety limits vary considerably all over the world.
There are numerous opinions on whether or not working, living, or going to school near cell phone towers increases cancer risk. However there is a need for more research to determine if the RF radiation emanating from cell phone towers can be damaging for your wellbeing. Moreover, the World Health Organization (WHO) and IARC have yet to formal categorize the impact of cell phone towers on health of humans.

Current wireless technologies create radiofrequency exposures, which could cause harm to humans as well as animals and the environment. Researchers have cautioned that 5G should not be introduced without adequate research regarding its impact on the health of humans.

Conflict of interests
The conflict of interest that surrounds 5G towers has raised alarming questions about the impact of EMF radiation on the health of humans. The stakes of this dispute are huge and involve the government and industry. World-renowned researchers have revealed the damaging effects on the body of EMF radioactivity on human and animals. With the increasing amount of data from science, we believe that the present regulations for non-ionizing radiation is unsuitable to safeguard the health of humans.

Impact on cognitive function
Intensifying the frequency of mobile towers, like those being constructed for 5G by mobile networks operators, could increase exposure to RF (radio frequency) waves. Some scientists have speculated that these radio frequency waves may alter the brain. But, this hasn't been confirmed.

While there has been some debate about the safety of 5G but the reality is that it has not yet been tested thoroughly enough to determine if it will cause health problems. Even though the technology is relatively new however, there isn't enough time to thoroughly test the long-term effects. There is also a lack of research studies about the potential impact of highly concentrated 5G areas in areas with a high population.