A second victim has been diagnosed with the plague state officials say, after visiting Yosemite National Park. The victim, who is not being identified, is being treated in Georgia, where he or she resides. The victim visited California from Georgia and stopped in both Yosemite and the Sierra National Forest in early August, according to The San Francisco Chronicle. The federal Centers for Disease Control is testing the person.

Just last month, a child visiting from Los Angeles County was the first victim, having been diagnosed in July with the plague after visiting Yosemite. It was the first reported case of the disease in the state since 2006. The child is recovering, health officials said.

In a report from the California Department of Public Health, it is suggested that two people recently in California have a disease best known for killing millions centuries ago that - despite all the advances of modern science - remains a real present-day problem, according to CNN.

There were also two cases of the plague in Colorado this year. Both a teenager in Larimer County and an adult in Pueblo County have died of the disease.

Following the first case, campers with reservations at the Tuolumne Meadows Campground had their reservations cancelled giving officials time to spray the campground and rodent burrow holes with insecticide, say sources at the California Department of Health, according to FOX News. Plague is carried by squirrels, chipmunks and other small rodents and is spread by their fleas.