Effects of exogenous bioresonance oscillations on biological and morphological characteristics of continuous human lung and liver cells were studied. Proliferative activities and viability of cells decreased after exposure to frequencies of 8 and 78.5 Hz. This was paralleled by cytopathic disorders in lung and liver cells. The frequency of 72 Hz exhibited a less intense effect on both cell types. Cell contamination with mycoplasmas was provisionally suppressed after cell exposure according to F44 and F45 programs and to 97.5 and 69.5 Hz frequencies.