However , SARS and bird flu are just a few of the deadly diseases emerging in recent years . Global networks provide early warning of potential outbreaks . Airborne diseases are the biggest threat to global health , say experts .
Ebola , SARS and swine flu are just a few of the deadly diseases outbreaks in recent years . Global networks provide early warning of potential outbreaks . Airborne diseases pose the biggest threat to global health , say experts .