Influenza surveillance: IDSP

Sunil Gupta

Abstract


Globally, acute lower respiratory infections (ALRI) are the second most common cause of illness in all age groups (429.2 million cases in 2004) and the third common cause of death (4.2 million or 7% of total deaths in 2004). Viral aetiologies like influenza virus and respiratory syncytial virus (RSV) are associated with the majority of episodes of ALRI in children and the elderly. Current estimates indicate that each year, seasonal influenza affects 5-10% of the world's population resulting in between 2,50 000 and 5,00 000 deaths. In addition lower respiratory infections are the leading cause of death in low income countries and third leading cause of death worldwide.


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