When handling this species how do keepers keep themselves safe from the herpes virus that so many of them carry?
My assumption would be that most zoos don't handle them unless there's a medical reason, and then they can use gloves and face masks.
Herpes B virus is a seriously dangerous disease, but the probability of transmission is very low and can be avoided with simple precautions. It's no different than keeping other poisonous/venomous/dangerous animals, there's always some risk involved. Now, thanks to the overreactions about the disease entire populations of macaques have crashed in North America, most beyond repair.