| cholera outbreak | 7.18 | Cholera outbreaks were not uncommon. | ||
| disease outbreak | 4.74 | Every disease outbreak tells a detective story. | ||
| anthrax outbreak | 3.03 | A chronology of the anthrax outbreak to date. | ||
| plague outbreak | 2.30 | The economic impact of the plague outbreak was also under review, they said. | ||
| flu outbreak | 1.71 | Lots of places have flu outbreaks. | ||
| virus outbreak | 1.05 | Pork selling businesses in Singapore affected by virus outbreak fears. | ||
| smallpox outbreak | 0.99 | In a smallpox outbreak, patients would presumably be treated in isolated facilities. | ||
| bird outbreak | 0.59 | The bird flu outbreak detected in mid-May has not harmed humans. | ||
| encephalitis outbreak | 0.59 | The warm, wet spring led to encephalitis outbreaks on the U.S. east coast. | ||
| fever outbreak | 0.53 | There were no immediate reports of any suspect fever outbreaks in the neighboring country. | ||
| measles outbreak | 0.53 | The measles outbreak began last week, Muketiwa said. | ||
| meningitis outbreak | 0.53 | The meningitis outbreak is a major cause of worry at the moment. | ||
| syphilis outbreak | 0.53 | But this syphilis outbreak hit late last year. | ||
| dengue outbreak | 0.46 | Thai officials fear the worst dengue outbreak in four decades. | ||
| salmonella outbreak | 0.46 | Still, salmonella outbreaks in restaurants make headlines. | ||
| influenza outbreak | 0.39 | Public health officials warned of an influenza outbreak. | ||
| polio outbreak | 0.39 | Polio outbreak in Caribbean blamed on low rate of immunization, | ||
| year outbreak | 0.39 | There have been serious outbreaks this year in Southeast Asia. | ||
| hepatitis outbreak | 0.33 | Hepatitis outbreak worries strawberry growers. | ||
| tornado outbreak | 0.33 | The final tornado outbreaks of the year occurred once again in the cool season. |