HSV 1 is readily passed onto marmosets and is fatal if untreated! Marmosets catch HSV 1 from contact with saliva from a person that is shedding the virus or from people with fever blisters.
Kissing your pet, allowing them to take food form your mouth or giving them access to anything you have had in your mouth is the most common way of transmitting the virus!!
Once your pet is infected the disease is rapidly fatal if left untreated. Only about 30-50% of animals that are treated will survive.
The treatment is still in the experimental stages and extremely costly!!