This is the reason to humans being unable to do this task, but wolves still are able to discover and target preys with the virus. Preys are proven in the hardes

This is the reason to humans being unable to do this task, but wolves still are able to discover and target preys with the virus. Preys are proven in the hardest conditions possible. Even a small respiratory problem would eventually appear and be fatal if the prey must endure a long distance chase running from wolves.