Influenza

Influenza is an acute, contagious respiratory tract infection caused primarily by influenza viruses A and B, which target the epithelial cells of the upper and lower respiratory passages

Influenza is an acute, contagious respiratory tract infection caused primarily by influenza viruses A and B, which target the epithelial cells of the upper and lower respiratory passages

It affects individuals of all ages, with severe illness and heightened complication risks disproportionately impacting young children, older adults, pregnant individuals, and patients with chronic underlying health conditions

It affects individuals of all ages, with severe illness and heightened complication risks disproportionately impacting young children, older adults, pregnant individuals, and patients with chronic underlying health conditions Pathophysiologically, viral replication triggers extensive host inflammatory and cytokine cascades, clinically manifesting as an abrupt onset of systemic symptoms—including high fever, chills, myalgias, headache, and severe fatigue—accompanied by respiratory signs such as a...

Pathophysiologically, viral replication triggers extensive host inflammatory and cytokine cascades, clinically manifesting as an abrupt onset of systemic symptoms—including high fever, chills, myalgias, headache, and severe fatigue—accompanied by respiratory signs such as a nonproductive cough, sore throat, and nasal congestion