[gus_massa]

The article claims that the new coronavirus is an "hybrid" of an usual coronavirus with some parts of HIV. If you mix both virus in a bottle of water, you don't get the hybrid.

If both virus infect a cell simultaneously, there is a small possibility that something like this happens. I think it's so small that is not possible to do it in a laboratory even on purpose, and definitively not by accident but IANAB.

It is easier with other virus. For example mixing variants of flu, because they have (IIRC) 8 strands of DNA. There are avian, swine, human, others flu, and each of them has many subvariants. If some animal get infected with two variants at the same time, a cell may have a double infection and the viral offspring may have a mix.

But the mix is a mix of the strands of DNA, like 3 swine flu + 5 human flu. This is usual, but you must consider that there are millions and millions of animals in the wild and farms. It's more difficult to do it in a small lab, but IANAB.

The main difference is that the article claim that the usual coronavirus and the HIV parts are in a single strain, not a bunch of strains packed together.