11.   Environmentalists say the herbicides being used to wipe out coca fields may harm humans and upset fragile and diverse Amazonian ecosystems.

12.   Ksiazek stressed that so far the Ebola virus that struck the Philippine monkeys has not harmed humans, unlike the deadly African strains.

13.   None of the Brookhaven officials interviewed could say what tritium does to harm humans, and in what quantities.

14.   The bird flu outbreak detected in mid-May has not harmed humans.

15.   The disease does not harm humans.

16.   The highly infectious ailment does not harm humans but is devastating to livestock.

17.   One expert close to the conference said that the detected radiation level was too small to harm humans.