Most of the primates are a sort of monkey called rhesus macaques. They are designated for use in scientific research, including experiments for COVID-19.
Further, it has recently been shown that rhesus monkeys kept on caloric-restricted diets for an extended time (nearly 15 years) have less chronic disease.
In the 1960s and 1970s, scientists studying rhesus macaques and chimpanzees used computer programs to figure out the range of sounds they should be able to make.
These researchers took X-ray videos of three living rhesus macaques while they were making a bunch of different facial expressions: like making noises, chewing, and swallowing.