Nutrition and supplements are an essential part of a healthy immune system. I won't go into the science, because there's many great articles written by the experts in the field. This is my current vitamin stack to optimize my immune system.
Vitamin A
Vitamin B
Vitamin C
Vitamin D
Calcium
Magnesium
Fish Oil (Omega 3)
Garlic Pills
There's a reason for their pairing and they all have their own benefits. Given the current pandemic, I'd highly recommend looking into how supplements play a role in health and immunity.
Much love and stay well.