Related by context. Frequent words. (Click for all words.) 75 whooping cough 71 pertussis 71 polio 69 meningitis 69 mumps 66 bacterial meningitis 66 influenza 65 malaria 65 H#N# 64 chicken pox 64 vaccination 64 swine flu 64 tuberculosis 63 immunization 63 flu 62 vaccinated 61 cholera 61 H#N# virus 61 rabies 61 H#N# flu 60 Polio 60 immunized 60 H#N# influenza 59 dengue 59 Tuberculosis 58 dengue fever 58 tetanus 58 diarrhea 58 TB 58 encephalitis 57 H#N# swine flu 57 cervical cancer 57 vaccinations 57 H#N# strain 57 infections 57 West Nile virus 56 avian influenza 56 infection 56 MRSA 56 West Nile 55 Swine Flu 55 immunizations 55 Influenza 55 bird flu 55 gastroenteritis 55 leprosy 55 swine flu virus 54 vaccinate 54 smallpox 54 Hepatitis 54 pneumonia 54 Rabies 54 hepatitis B 54 virus 54 flu virus 54 seasonal flu 53 West Nile Virus 53 communicable diseases 53 vaccinating 53 chlamydia 53 bird flu virus 53 disease 53 avian flu 53 Flu 52 Vaccination 52 influenza virus 52 superbug 52 vaccine 52 Swine flu 52 Ebola 52 norovirus 51 malnutrition 51 HIV infection 51 highly contagious 51 Immunization 51 Malaria 51 hepatitis 51 vaccines 50 respiratory illness 50 fevers 50 respiratory infections 50 infectious disease 49 syphilis 49 bacterial infection 49 RSV 49 HIV 49 salmonella 49 gonorrhea 49 pandemic 49 infectious diseases 49 HIV infections 48 H#N# bird flu 48 HIV AIDS 48 sexually transmitted disease 48 sexually transmitted infections 48 WHO 48 Lyme disease 48 jaundice 48 HPV 47 maternal mortality 47 flu vaccine