Plum pox virus has been officially eradicated from Pennsylvania.

The state was declared free of the virus, which can disfigure fruit but is not harmful to humans, in 2009. After an additional three years of required monitoring, the disease has not reappeared, and can be considered officially eradicated, according to a news release from the Pennsylvania Department of Agriculture.

Pennsylvania was the first U.S. state to report plum pox. Since the first discovery, in 1999, 1,675 acres of orchard in the state have been destroyed because of the virus.

In December, the New York State Department of Agriculture and Markets announced that the absence of plum pox in Orleans and Wayne counties meant that stone fruit growers there could resume planting trees.

The New York counties, however, remain under quarantine. A third New York county, Niagara, is under quarantine and is a regulated area, which prohibits growers from planting trees there.

New York is the only U.S. state that has not eradicated plum pox.