Dlamini's arrival was merely a small part of things in the grand scheme.
Several days later, Brando and the others emerged from the isolation zone. With their proud and strong physique, there was very little chance of them contracting diseases such as tuberculosis in the first place.
After Brando came out, there was a call from the research center office, informing him that Chen Chen wanted to meet him.
Brando's knowledge of Chen Chen was as much as anybody else's, which was to say, not a lot. Chen Chen was an extremely peculiar individual.
One could say he was a businessman but he spent his days in the laboratory. Most of the business procedures were handled by other people while he pretty much took on a hands-off approach.