الملخص الإنجليزي
Annually, influenza causes 650 000
fatalities, 3 to 5 million severe cases,
and affects over 1 billion people
worldwide, making it one of the world's
top causes of morbidity and mortality.1
The influenza
pandemic is considered one of the 10 main threats
facing global public health.1
In addition, influenza
affects 5–10% of adults and 20–30% of children
worldwide.2
Influenza viruses undergo continuous
genetic alterations, resulting in modest antigenic
changes known as 'antigenic drift', necessitating
routine updates of seasonal influenza vaccines.
