1.   Most people have been exposed to it, but if your-immune system is intact the protozoa will seldom do harm.

2.   When taken in the prescribed manner they have never been shown to do any harm.

3.   Generally the failure of Hello, Dolly!

4.   Archeologists say the influx of cars and people to the Pyramids area cannot help but do harm, no matter what precautions are taken.

5.   Deleting the wrong files can do real harm.

6.   Each lens has ways of helping the workplace, but also can do serious harm.

7.   For once they are on the books, there may be no way of getting rid of them even after they start doing more harm than good.

8.   He is in solitary confinement in a Maryland jail, relieving him of the sort of life choices and chances to do harm.

9.   In some cases laboratory studies suggested risk but there were no studies in the field to test if harm did or did not occur.

10.   In the bottled water and sneaker markets, mergers are allowed unless antitrust authorities can prove that added concentration would do harm.