They are preparing for an 'outbreak of' the virus.
an 'outbreak of' violence/war
a cholera 'outbreak'
(..) starting to break. All the models are forecasting lifted indices from - to -. If the cells keep building, there could be a record outbreak of tornados. This is going to be a long day. Are you sure she'll be there? If I know Jo, she's already dragged her department into the field. (..)1996 Twister