Over millions of years, retroviruses, which insert their genetic material into the host genome as part of their replication, have left behind bits of their genetic material in vertebrate genomes.
The ebola virus is one of the nastiest pathogens known to man. It corrodes blood vessels and stops clotting, leaving most of its human victims bleeding to death through their pores. And guinea pigs — along with opossums, wallabies and insect-eating bats — have it in their genes.
Over the past decade, there has been a rising cacophony of predictions that genetic discoveries emerging from the Human Genome Project would revolutionize primary medical care. However, despite these predictions, genetic practice in primary care has undergone little change.