Sparks contributed to the research that led to the development of a vaccine for polio that has virtually eradicated the disease worldwide.

The once sleazy image of Bangkok at night has been virtually eradicated in the past 30 years.

Virtually eradicated from the state for 30 years, the disease returned in 1991, touching off a great deal of public consternation.

With the bison having been virtually eradicated a few years earlier, the Sioux were at risk of starvation.

It had virtually eradicated polio in the USA by 1965.

And they are trying to save rare plants that were virtually eradicated.

Polio vaccination programs have virtually eradicated new cases of poliomyelitis in the United States.

Leprosy and polio - illnesses virtually eradicated in the West - are rampant.

It had been virtually eradicated by the loss of habitat.

The standard of living for ordinary Swedes rose rapidly and real poverty was virtually eradicated.