Related by context. Frequent words. (Click for all words.) 61 penicillin 57 Penicillin 55 streptomycin 54 Amantadine 54 antimalarial drug 53 resistant TB 52 staphylococci 52 BCG vaccine 52 Salk vaccine 52 methicillin 52 Chlamydia trachomatis 52 poxvirus 52 strep bacteria 52 mutated virus 51 herpes viruses 51 antibiotic 51 Helicobacter 51 cyclosporin 51 insecticide DDT 51 retrovirus 51 penicillins 51 mutant strain 51 chemotherapeutic drug 51 scorpion venom 50 antitoxin 50 influenza pandemics 50 Norplant 50 quinolones 50 anti malarial drug 50 mutant strains 50 amphotericin B 50 bacterial strains 50 bacterial pathogen 50 fusion inhibitors 49 antiviral therapies 49 ribozymes 49 antimalarial drugs 49 Y. pestis 49 cephalosporins 49 antibiotics 49 Staphylococcus aureus bacteria 49 bacteriophages 49 HeLa cells 49 T. gondii 49 genetic alteration 49 multidrug resistant 49 macrolides 48 disease vCJD 48 isoniazid 48 Vancomycin 48 artemisinin 48 macrolide 48 mycobacterium 48 retroviral 48 antifungal agent 48 H pylori 48 tigecycline 48 falciparum malaria 48 Vfend 48 Chloroquine 48 Dasatinib 48 recombinant vaccines 48 noninfectious 48 protease inhibitors 48 vincristine 48 proteasome inhibitors 48 H. pylori 48 Yersinia pestis 48 sulfa 48 oseltamivir Tamiflu 48 avian influenza H#N# 47 herpes infection 47 virulence factors 47 pneumococcal bacteria 47 Dengue virus 47 flu pandemics 47 Wheat gluten 47 antibacterial agents 47 tamperproof packaging 47 nelfinavir 47 staph germ 47 Peanut allergy 47 bacterial toxins 47 rifampicin 47 granisetron 47 NNRTIs 47 smallpox 47 amantadine 47 HCV infections 47 lethal toxin 47 Zolinza 47 daptomycin 47 collagenase 47 causative agents 46 therapeutic regimens 46 ribozyme 46 antiretroviral therapies 46 bacilli 46 PCV7 46 naturally occurring substances 46 antimalarial