A method includes identifying a first user device potentially associated with a biological threat event and establishing a relevant time period of the biological threat event. The method further includes identifying geographic location coordinates associated with the biological threat event based on the relevant time period of the biological threat event and geographic location coordinate information of the first user device for the relevant time period. The method further includes identifying a second user device potentially associated with the biological threat event based on the geographic location coordinates associated with the biological threat event and geographic location coordinate information of the second user device for the relevant time period. The method further includes issuing status information to the second user device, where the status information includes the relevant time period of the biological threat event.