An article in BioWorld Today, Jan. 9, 1998, on the role of selenium in protecting viruses from immune system attack, should have said the relative abundance of hydrogen and selenium in the earth's crust is 1.4 parts per million and 0.1 parts per million, respectively. Also, the story should have said proponents of alternative medicine urge people seeking health and wellness to consume 200 mcg to 300 mcg of selenium daily, and lifelong.