The continuous increase of heavy metals, including lead (Pb), in the air, land, and water, is recognized to be one of the main environmental problems produced by industrialization. According to the Environmental Protection Agency (EPA), Pb is identified as the most common heavy metal contaminant in the environment. Anthropogenic activities such as mining, smelting, burning of fossil fuel, and the manufacture of pesticides and fertilizers are some of the primary source of Pb contamination of the environment. The aim of the work in this book is to examine the effects of different concentrations of lead nitrate on the systemic movement of different RNA viruses. Knowing the factors that are involved in the viral movement inhibition will allow us to produce crops that are resistance to viral infection.