When the body detects a virus or bacteria, it responds by firing up the immune system.
Symptoms such as a high temperature or swollen lymph nodes can indicate it has engaged its defences.
The body’s actions tend to take a lot of energy, with fighting off the infection being its primary concern.
As a result, it takes resources which would otherwise have duties elsewhere to help with the war effort.
Published at Fri, 29 May 2020 15:27:00 +0000