Posted February 2, 2018
These are not the usual sick and elderly people who die from influenza. But every year, flu carries away perfectly healthy young adults and children, and tens of thousands of people over 65.
How does flu kill, and why does it sometimes kill so quickly?
Doctors who study the body’s immune response say there are three main reasons: co-infection with another germ, usually bacteria such as strep; aggravation of existing conditions such as heart disease and asthma; and a so-called cytokine storm, marked by an overwhelming immune system response to infection.