What is the cause and effect of the influnza pandemic?

The cause of the influenza pandemic is the emergence of a new strain of the influenza virus, which can spread rapidly among populations due to limited immunity. This can result from genetic mutations or reassortment of viral genes from different strains. The effect of the pandemic includes widespread illness, increased healthcare demands, economic disruptions, and significant mortality, particularly among vulnerable populations. Additionally, pandemics can lead to heightened public health responses and changes in vaccination strategies.