what are interesting facts of human immunity?

There are many interesting facts about human immunity, as the immune system is a complex and constantly evolving system that researchers are still trying to fully understand. Here are a few examples of lesser-known facts about human immunity:

• Sleep is important for immune function: Getting enough quality sleep is essential for immune function, as sleep allows the body to produce cytokines, which are proteins that help fight infections.

• Immunity can be passed from mother to child through breast milk: Breast milk contains antibodies that help protect newborns from infections and diseases.
• The immune system can distinguish between "self" and "non-self" molecules: The immune system has the ability to recognize and attack foreign invaders like viruses and bacteria while leaving the body's own cells unharmed.
• The immune system can remember previous infections: Once the immune system has encountered and fought off a particular pathogen, it can remember how to do so in the future, allowing for a faster and more effective response if that pathogen is encountered again.
• The immune system can sometimes mistakenly attack the body's own cells: This is known as an autoimmune disorder and can lead to a range of conditions, including rheumatoid arthritis, multiple sclerosis, and lupus.
• Stress can weaken the immune system: Chronic stress can impair the immune system's ability to fight off infections and diseases, making individuals more susceptible to illness.
• Gut bacteria can influence immune function: The gut is home to trillions of bacteria, and research has shown that these bacteria can play a role in modulating immune function and protecting against disease.

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