What are some warning signals that a pandemic might be about to start?
The most important signal will be the appearance of clusters of patients with clinical influenza suggesting H5N1, closely related in time and place, suggesting human- to-human transmission. Organizations like WHO and the Center for Disease Control and Prevention (CDC) are monitoring the current H5N1 situation and will not officially proclaim the beginning of a pandemic until confirmed by their reference laboratories.
The most important signal will be the appearance of clusters of patients with clinical influenza suggesting H5N1, closely related in time and place, suggesting human-to-human transmission. Organizations like WHO and the Center for Disease Control and Prevention (CDC) are monitoring the current H5N1 situation and will not officially proclaim the beginning of a pandemic until confirmed by their reference laboratories.