World Health Org raises ‘swine flu’ pandemic alert level from 4 to 5
April 29, 2009
Based on assessment of all available information and following several expert consultations, Dr Margaret Chan, WHO’s Director-General raised the current level of influenza pandemic alert from phase 4 to 5. She stated that all countries should immediately activate their pandemic preparedness plans. At this stage, effective and essential measures include heightened surveillance, early detection and treatment of cases, and infection control in all health facilities.
A phase 5 alert means there is sustained transmission among people in at least two countries. Once the virus shows effective transmission in two different regions of the world, a full pandemic outbreak — level 6 would be declared, meaning a global epidemic of a new and deadly disease.