It’s a theory being pushed by a Italian doctor that almost every other person in the field rejects. Yes, it’s a theory but with no support. In fact if you do a search for it good luck finding anything. On the other hand there are numerous reports, studies and opinions by everyone else saying why it won’t “die out “. Here’s one I posted probably a week ago on the differences of Covid with others. It compares SARS-COV, one that people think just went away, which is false and a topic for somewhere else, with 19 .
COVID-19 and SARS are both caused by coronaviruses. There are many similarities between these viruses. However, there are also key differences.
www.healthline.com