Gallic acid was found to show cytotoxicity against cancer cells, without harming healthy cells.

The drug did not harm uninfected cells, thus offering hope that it would have no toxic side effects in humans.

If these programmed cells ran roughshod throughout the patient's body, they could also harm healthy cells.

Targeted therapy is a type of treatment that uses drugs or other substances to find and attack specific cancer cells without harming normal cells.

But it can also harm healthy cells that divide quickly, such as those that line your mouth and intestines or cause your hair to grow.

Targeted therapy uses drugs or other substances to identify and attack specific cancer cells without harming normal cells.

An adenovirus without its E1a gene could not harm normal cells.

Although radiation treatment is focused on cancer cells, it can also harm healthy cells.

However, it can also harm healthy cells, which causes side effects.

Melanin absorbs some of the incoming rays to keep them from harming other cells.