Your innate immune system is your body's barrier system which aims to keep viruses, bacteria and parasites out of your body and/or stifle their mobility.
The same scurvy made famous by pirates and British sailors from the 1700s, who would go for months or years at sea without fresh produce, experiencing symptoms from bleeding gums, unexplained swelling, bruises, fatigue. rashes and hemorrhaging is around today as crazy as that may seem!