How does our immune system react to the coronavirus?
Like any virus, the coronavirus is little more than a shell around genetic material and a few proteins. In order to reproduce, it needs a host in the form of a living cell. Once infected, it does what the virus commands: copy, assemble, and release information. But that does not go unnoticed. Within a few minutes, the body's own immune defense intervenes with its innate response: granulocytes, phagocytes and killer cells flow from the blood and lymphatic vessels to fight the virus. They are supported by numerous plasma proteins that either serve as messenger substances or help to destroy the virus. With many viruses and bacteria, this initial activity of the immune system is sufficient to fight an intruder. Often this happens very quickly and efficiently. We feel that the system is working: we have a cold, we have a fever. Symbolic picture of the flu wave (picture-alliance / dpa / A. Gebert) How our immune system makes itself noticeable to us A subset of the signaling proteins that...