The animals lived in what' s called a Biosafety Level 2 facility because of their infections. Workers wore Tyvek suits, gloves, and booties. There were no windows. Bigger monkeys had a bit more room. The monkeys' social isolation bothered Ms. Weiss.
Monkeys live in groups in the wild.
In order to avoid cross-infections between animals, or other complications that could pollute the experimental data, animals were kept apart. Even infants lived alone. In short order, Ms. Weiss felt there was little she could do for these monkeys. Maybe she'd be more successful with the chimpanzees housed in the infectious disease building. That's when she began her work with Jerom.