A well-researched, well-written book, 'The New Killer Diseases' does an excellent job of explaining the bacterial, viral, and prion threats we are up against--or were, as of the book's publication in 2003--in plain English.
My only 'criticism' of 'The New Killer Diseases' is that, thirteen years on from publication, advances in medicine and happenings in world events have made some of what's in the book incorrect and/or dated, respectively. There is a herpes vaccine now, for example, where there wasn't one at the time the book was published, and the text reflects that. One thing that has not changed, and has only grown worse, is the prevalence of drug-resistant bacteria, and the reasons for the increase are the reasons the resistant bacteria gained a foothold in the first place: overprescription of antibiotics by doctors, people stopping antibiotics before finishing the full course, and over/misuse of antibacterial products. Within the last two or three days, the FDA banned almost twenty antibacterial chemicals used in common products (the companies have a year to remove the chemicals from the products or to stop selling the products), and they've asked companies for proof of effectiveness and safety about three more, so, hopefully, that will have a positive impact on drug-resistance.