Do you think there has been more than one type of lab engineered virus released?

I've been wondering about this.

Early on, China slapped over half a billion people into lock down. It must have looked really bad. There was a video of an Oriental doctor saying that initially the Wuhan death rate in hospitals was over 50%.

So assuming the initial release, whether accident or deliberate, was the one with the HIV snips added (according to multiple scientists including the Nobel prize winner for discovering HIV).

It seems like the best antidote would be to release another Corona virus. The way you vaccinated for smallpox was to use vaccinia virus, a very similar pox but not the variola of small pox. Some people died from it, but nearly at a smallpox rate.

So maybe they let a couple other Coronas out, maybe plain old SARS or some other thing that was very infectious and might get to more people faster than the initial COVID? A lab like that probably was messing with various Corona viruses.

It seems odd that suddenly children now have this weird new complication that they didn't a month ago, and symptoms differ so drastically from person to person and even in nations and regions.

Can all of it be explained by rapid mutations? Do you think all we have is the original COVID and its offspring?

The USA had to know every early that this thing had HIV inserts and could potentially live forever in those who catch it, causing lifelong lowered immunity. Could the USA have let out their own Corona strain- even if bad- to help people avoid COVID? I know some colds are Corona so they must have them in the labs.

If you have any scientific links, please share. I miss a whole lot of material on that fast moving long COVID thread.

Thanks!