Yes, I’ve come to believe that COVID is a coverup for 5G-induced illness.

Maybe so. How can we know if this is true? What could we do about it?

5G runs on the same frequency as oxygen absorption . It  functions as an oxygen disrupter. Coincidentally so does COVID 19. Same thing. Can't breathe ? It ain't Corona

Yes, I’ve come to believe that COVID is a coverup for 5G-induced illness.

I don't think COVID is anything that needed to be covered up in the first place. The government and media could have just ignored that virus completely, and if anyone high up started to ask questions, it could have dismissed as "Oh, the flu season is a little worse than usual this year."
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I'm highly skeptical of the idea that radio waves cause illness. I remember back in the late 90s everyone was saying people were going to all start dying of brain cancer from holding a cellphone to their head while it was transmitting radio signals, and that never materialized.
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I mean, radio signals have been broadcast continuously across the world since Marconi, over a century now. I'm sure someone would have connected the two if there were a real connection between radio waves and human health. But I've never heard of any doctors (in any significant numbers) claiming radio waves can cause health problems until cell phones came along. And everything they said about cell phones killing people has since been proved wrong.
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And during most of the 20th century, the medical professional was not socialized, not run by the government, not run by affirmative action so that most of them were 3rd worlders like now, and not subject to destructive lawsuits. During the 20th century, doctors were truly intelligent men, scientists who earned their position and were free to practice medicine properly. They had the freedom to examine data and provide objective analysis. If they didn't discover any connection between radio waves and human health during that whole century, then it's hard to say there is any.
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Radio waves aren't exactly something highly mysterious, whose properties are unknown. They're something pretty simple and straightforward. The idea that they are all killing people and doctors mysteriously can't figure that out strikes me as implausible.
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Sure, there are a few doctors here and there who have been saying this. You can find one or two doctors here and there who will say just about anything. But given universal effect that we're talking about (everyone is exposed to radio waves), and the relatively simple mechanism we're talking about, I don't see anywhere near the number of actual doctors talking about it as I would expect, if it were a real idea.

Interesting, but then how do Bill Gates and Dr. Fauci (and all the rest of the crooks) plan on breathing?

5G is very targeted with limited range. You can avoid it by keeping it out of your home(wifi) and by not giving it the means of transmission ( earpods, cellphones) Keep your kids out of the schools. It can be blocked with simple metal obstructions ( yes the old tin foil hat- there is always truth in  ridicule. That's how they shame people to not protect themselves- of course it isn't literally a tinfoil hat, but a barrier of some sort ) The elites will easily bypass this; otherwise they would never let it out.

Do you believe that corruption suddenly set in with the medical community in the 21st century, while doctors 20th century medicine was previously squeaky clean? You need to study the issue more closely.

Yes. Start with looking at the Rockefellers in 1933 buying up the pharmaceutical companies and buying influence in the medical schools and buying lawmakers to outlaw anything other than pharmaceuticals. Easy info to find before the search engines started playing with algorithms.

Sure, there are a few doctors here and there who have been saying this. You can find one or two doctors here and there who will say just about anything. But given universal effect that we're talking about (everyone is exposed to radio waves), and the relatively simple mechanism we're talking about, I don't see anywhere near the number of actual doctors talking about it as I would expect, if it were a real idea.

Research only gets done with funding. Who is going to fund research that may destabilize the global economy and civilization as we know it?