The dentist that work for had a dizzy spell, lost feeling in his right hand. Took him to the ER, check in nurse claimed " what's going on, you are my 6th patient since 9:00 that has had the same symptoms. He's had 3 moderna shots. The hair on my neck stood up.
I'm in Florida, Space Coast area
As far as fields go, there are two key points. The frequency, and the amplitude of the wave. When power goes through a wire, the current (measured in amps) going through the wire creates a magnetic field. The higher the current, the higher the amplitude or "intensity" of the field.. That is why the fields coming off those smaller street power lines are "stronger" than the high voltage lines. Those high voltage lines go through step-down transformers to feed the smaller lines with lower voltage-higher current power, which then goes through yet another step-down transformer where it is converted into 110/220v power that hits your house and feeds your devices
If you want to get even more technical, there are electrostatic and electromagnetic fields. Current (amps) creates an electromagnetic field, while voltage (volts) creates the electrostatic field. When people talk about EMFs being harmful, they are normally referring to the magnetic field aspect.
As per them being harmful, a lot is up in the air regarding that, and everyone has their own opinion on it with very little proof as to what's actually going on, on either side. My opinion is that if they are harmful, the amount of harm comes from those two key points above, the amplitude/intensity, and the frequency. Higher amplitude would almost always equal "worse for you", as if the field is stronger in intensity it logically would have a higher chance of affecting you.
The frequency part gets a bit more complex. Everything being made of energy has a set frequency or group of frequencies, and introducing an outside frequency can either have a positive or negative effect depending on how that frequency resonates with the object. As a very crude example if you have something resonating at 10hz, and it functions most efficiently at that frequency, then if you introduce a frequency of 12hz it is going to interfere with the object, the waveforms are going to combine, and that 10hz object is no longer going to resonate at 10hz but instead resonate at some frequency in between 10hz and 12hz based on the amplitude of each original object/wave. Considering in this example that object operates most efficiently at 10hz, it is no longer going to be operating at peak efficiency. That means the wave would have a negative effect.
Now if the object is say resonating at 9hz originally but functions best at 10hz, and you hit it with a 11hz wave of the correct amplitude, it could cause a shift in resonance from its original 9hz to 10hz where it operates most efficiently. This wave would then have a positive effect.
So it's a lot more complex than flat out saying "all EMFs are bad". There are some that are definitely bad, while others could be beneficial. Some that are bad for one object or individual could also theoretically be beneficial for another. My personal guess is a lot of these frequencies that are commonly used in society are bad, either for most or all people. Why did we pick our electric grid to run at 60hz? Why is our music tuned to 440hz rather than 432hz? Why does our earth resonate at around 7.83hz?
What struck me is that there is a lot of concern for the high-voltage power lines, even to the point of people not buying houses close to them, but even higher EMFs seem to be generated by the street power lines, because although lower at the wire, because they are so much closer to houses than the high-voltage lines which have the higher EMF at the wire, their proximity makes the EMF force higher. And I was amazed at the range in some street wires; some would be barely detectible a 100 feet away, while others produced a very strong signal a few hundred feet away.