The immune system has a memory
One of its most remarkable features is the ability to remember pathogens it has encountered before. This memory is the basis of how vaccines work, providing long-term protection against disease.
March 11th · National Immune System Day
When was the last time you said “thank you” to your immune system?
March 11th is National Immune System Day — celebrate your immune system all month long with our Challenge.
The Challenge
National Immune System Day Challenge
-
1
Get your immune score
In about 1 minute you can find out how your immune system is performing.
-
2
Commit to take action
Choose one easy action item that will help your immune system perform better.
-
3
Challenge your friends
Share what you're doing for your immune system with your friends and loved ones.
The Role
Your immune system's role
Your immune system is the first line of defense — our body's primary defense mechanism against diseases. It identifies and combats pathogens like bacteria, viruses, fungi, and parasites. Its role extends far beyond fighting infections, though: it's integral to overall health, influencing everything from digestion to neurological function. A robust immune system is also crucial in wound healing and in preventing the inflammation that can contribute to chronic disease.
The immune system is also the key to advancements in medical treatments. Knowledge of how it works has paved the way for innovative therapies, including immunotherapies for cancer and autoimmune diseases. If there is ever going to be a cure for cancer, the immune system will be at the center of the technology.
Fun Facts
Immune system fun facts
There are two types of immunity
The immune system has two parts: innate and adaptive. Innate immunity is the first line of defense and responds quickly to invaders. Adaptive immunity develops in response to specific pathogens and provides long-lasting protection.
The gut is a major immune organ
About 70% of the immune system is located in the gut. The gut microbiome — trillions of bacteria — plays a crucial role in educating and regulating the immune system.
Sleep is crucial for immune function
Adequate sleep is vital for a healthy immune system. During sleep, the body produces cytokines — proteins that help fight infection and inflammation.
Stress affects immune health
Chronic stress can suppress the immune system and make you more susceptible to illness. Managing stress through meditation, exercise, and proper relaxation can boost immune function.
Take the Challenge
See how your immune system stacks up!
Take the quick assessment below — in about a minute you'll get your immune score.
FAQ
Frequently asked questions
What is National Immune System Day?
National Immune System Day is observed annually on March 11th. It's a day dedicated to raising awareness about the importance of the immune system and promoting practices that enhance immune health.
Why is the immune system important?
The immune system is vital because it protects our body from harmful pathogens such as bacteria, viruses, and other foreign bodies. It's essential for our survival and plays a key role in maintaining overall health and preventing disease.
How can I strengthen my immune system?
You can strengthen your immune system through a balanced diet rich in fruits and vegetables, regular physical activity, adequate sleep, stress management, and avoiding harmful habits like smoking and excessive alcohol consumption.
How can I get involved or support National Immune System Day?
You can get involved by joining the National Immune System Day Challenge and sharing your results on social media.