What kind of monkeys were on the truck??
MonkeyPox
>>https://www.cdc.gov/poxvirus/monkeypox/index.html
"The disease mostly occurs in Central and West Africa.[9] It was first identified in 1958 among laboratory monkeys"
"Monkeypox was first described by Preben von Magnus in 1958 in laboratory cynomolgus monkeys (long-tailed macaque), when two outbreaks of a smallpox-like disease occurred in colonies of monkeys kept for research.["
>>https://en.wikipedia.org/wiki/Monkeypox