human
How does the symbiotic relationship between the symbiont and the host affect the host's immune system?
assistant
The symbiosis affects the host's immune system in a variety of ways. For example, some bacteria can produce substances that help the host fight off infections. Other bacteria can directly stimulate the host's immune response by releasing antigens into the host's bloodstream. In addition, the presence of certain types of bacteria can also reduce inflammation caused by other bacteria.