_Bacteria and Viruses_ is a fine introduction to the microscopic world of germs, viruses, bacteria, etc. Appropriate for elementary-aged students, _Bacteria and Viruses_ has easy-to-read descriptions and photographs of germs, viruses, bacteria, and allergens. Includes a table of contents, a glossary, and an index. This book would be a good resource for answering research questions about germs, bacteria, viruses, and allergens.