Of course, if your goal is to reduce the global population by 90%, this is an excellent idea. That's always the agenda-behind-the-agenda with the globalists.
[ Providing an easy vector for animal diseases (of which there are many that humans have zero resistance for but which are by themselves unable to cross the species barrier) to cross over to human populations. ]
If the pigs are raised in a sterile environment then there should be no illnesses that you get from the transplant, HOWEVER, you would after receiving an organ be susceptible to catching a pig related illness if you went to visit pigs or any animal OR Human carriers of pig only diseases.
The article said that the piglets are being grown in a sterile environment. If there are viruses that only infect pigs, not humans, it is unlikely those viruses would be able to infect a pig organ in a human body. The virus would have to get there through human tissues, and the human immune system would probably kill it. Although people's immune systems are suppressed as part of the transplant process.
I think there would be some danger from the retroviruses that are part of the pig genome (all mammals have retroviruses in their genomes) if those viruses are not part of the human genome.
Last, pigs have a sugar residue on the surface of their cells that is not on human cells. I wonder if the mention of genetically engineered pigs is in reference to removing that sugar to make the cells more compatible with human cells.