This isn't true. Look at Derek Brozes research among others although his is the most in depth. This 5g thing with coronas only came about because wuhan is saturated with 5g already but if you look at other examples like Houston for instance they had 5g a year or two before conoras hit. There are many other examples like that. To play devil's advocate maybe they change the signal after putting in the towers or w.e, or maybe it takes time idk, but the fact is a lot of cities had 5g before this coronas thing hit. I would say rich countries are the ones with money to buy PCR tests and a more centralized society in general to administer those tests hence why they have more cases and deaths.