Topics: Medical Microbiology, human microbiome, sterilization, disinfection, antisepsis, microscopy, molecular diagnosis, serologic diagnosis, immune response, innate host responses, Antigen-Specific Immune Responses, Antimicrobial Vaccines, bacteriology, Bacterial Metabolism, bacterial Genetics, Antibacterial Agents, Staphylococcus, Gram-Positive Cocci, Streptococcus, Enterococcus, Bacillus, Listeria, Mycobacterium, Acid-Fast Bacteria, Neisseria, Haemophilus, Enterobacteriaceae, Pseudomonas, vibrio, Campylobacter, Helicobacter, Gram-Negative Rods, Clostridium, Non–Spore-Forming Anaerobic Bacteria, Treponema, Borrelia, Leptospira, Mycoplasma, Rickettsia, Ehrlichia, Chlamydia, virology, Viral Pathogenesis, Antiviral Agents, Infection Control, Papillomaviruses, Polyomaviruses, Adenoviruses, Human Herpesviruses, Poxviruses, Parvoviruses, Picornaviruses, Coronaviruses, Noroviruses, Paramyxoviruses, Orthomyxoviruses, Rhabdoviruses, Filoviruses, Bornaviruses, Reoviruses, Togaviruses, Flaviviruses, Bunyaviridae, Arenaviridae, Retroviruses, Hepatitis Viruses, Prion Diseases, mycology, Fungi, Antifungal Agents, Superficial Mycoses, Cutaneous Mycoses, Subcutaneous Mycoses, Opportunistic Mycoses, Parasitology, Antiparasitic Agents, Intestinal Protozoa, Urogenital Protozoa, Nematodes, Trematodes, cestodes, Arthropods