"The earliest and most widespread case of a serious plant disease ever in the East is forcing the removal of tomato plants from stores in New York and New England. This infectious disease is called late blight, the same disease that caused the Irish Potato Famine in the 1840s. It does occur occasionally in the Northeast, but this year's rainy weather has accelerated the spores' airborne spread. On top of that, infected plants have been widely distributed by big-box retail stores.
According to the Associated Press, the disease is not harmful to humans, but it is quite contagious. It is most likely spread on garden center shelves to plants that were not involved in the initial infection. Once plants reach gardens, both home and commercial ones, the disease can also spread."