We have global human travel, global plant and animal travel. It’s really a new paradigm and challenge for earthlings to deal with viruses that can cause disease and become a pandemic so quickly. There needs to be global sentinel testing of animals and plants that globally travels for various pathogens. Viruses have to have a living vector and a critical population size to succeed - our habits fit perfectly with their needs.
Plant viruses have always interested me cause they don’t cause disease and there are only 3 families that infect plants, and animals/humans. However that may not be true anymore cause several now are suspected to cause human illness. Antibodies against the viruses characterized- there is a pepper virus that is interesting because it produces intestinal pain but appears to have molecular mimicry to protect against Parkinson’s. There’s a concern some plant viruses could become problematic in future especially with so much travel, gene flow and hybridization so a virus doesn’t have to mutate just acquire new genes. Humans definitely make antibodies to a number of different plant viruses that infects our food. Just think what a issue if a food source could become a vector for a pandemic virus- like rice, corn or tubers/taters.
There are just too many Machiavellian despots running around planet for much cooperation against any global issue.