Related by context. Frequent words. (Click for all words.) 61 flu outbreak 60 dengue outbreak 60 bird flu outbreak 59 outbreak 59 H#N# flu pandemic 59 swine flu outbreak 58 A/H#N# flu 58 bird flu epidemic 57 pandemic 56 epidemic 56 bird flu 56 H#N# pandemic 56 avian flu outbreak 55 swine flu pandemic 55 SARS 55 bird flu outbreaks 55 swine flu epidemic 54 avian flu 54 outbreaks 54 atypical pneumonia 54 H#N# swine flu 54 SARS outbreak 54 A/H#N# 54 swine flu 54 measles outbreak 53 Severe Acute Respiratory Syndrome 53 influenza pandemic 53 avian influenza 53 bird flu pandemic 53 H#N# flu 53 flu pandemic 52 dengue fever 52 Dengue fever 52 SARS epidemic 52 dengue 51 cholera outbreak 51 flu epidemic 51 HFMD 50 epidemics 50 swine flu virus 50 H#N# 49 H#N# Swine Flu 49 H#N# influenza virus 49 H#N# virus 48 Swine Flu 48 pandemic influenza 48 pandemic flu 48 Aids epidemic 48 Dengue 48 dengue cases 48 H#N# influenza 48 Sars 48 Sars virus 48 deadly H#N# virus 48 cholera 48 cholera outbreaks 48 pandemic H#N# 47 avian flu virus 47 avian flu pandemic 47 influenza 47 WHO 47 H#N# avian flu 47 H#N# avian influenza 47 mosquito borne disease 47 AIDS epidemic 47 influenza epidemic 46 influenza pandemics 46 HIV AIDS epidemic 46 Sars outbreak 46 H#N# Influenza 46 Avian flu 46 Avian Flu 45 mosquito borne illness 45 Salmonella outbreak 45 infections 45 H#N# Flu 45 Japanese encephalitis 45 flu 45 swine influenza 45 crisis 45 communicable diseases 45 Swine flu 45 Avian influenza 45 Bird Flu 44 Health Organisation WHO 44 Bird flu 44 bird flu virus 44 H#N# bird flu 44 counterfeit medicines 44 Chikungunya 44 melamine contamination 44 whooping cough 44 Health Organization WHO 44 mad cow 44 Health Organization 44 infectious disease 44 contagious diseases 44 xenophobic attacks 44 superbug 43 tuberculosis TB 43 Health Organisation