Jumping on a soapbox and speaking on this topic now as just another individual here (not as NT admin)

I feel it's important to distinguish between having specific immunity to this novel coronavirus (per what kiwi33 posted) and doing all possible to keep one's immune system as well functioning as possible (as caroline2 has posted)

Long before this virus.....
I have always been a firm believer in maintaining a healthy immune system via a clean as possible environment in my home & garden so as not to stress immune system, (ie no pesticides, household chemicals, dusty clutter etc) and also keeping my diet as healthy & organic as I can, as well as taking daily nutritional supplements known to be of benefit (which even my MD agrees on!)

I am not an "anti-vaxxer" per se, but I am cautious of some vaccines and how they impact our immune systems, while recognizing those vaccines that have also saved countless lives ( I am old enough to remember people with polio, but also educated enough to consider thimerisol in vaccines hazardous.)

Decades of both formal and personal education, as well as caring not just for myself, but also for some very health challenged family members, have taught me that many natural remedies (including foods!) have remarkable healing or health protective properties, and sometimes conventional medicine is slow to catch up on those.
Not everything beneficial has scientific research behind it, and often anecdotal evidence is highly underrated.

So I tend to keep a very open mind on health and healing, while still being mindful of the importance of science and conventional medicine when it is sound and well practiced.

I know not everything "natural" is necessarily beneficial, and as with most treatments, not everyone responds the same way to the same thing.
I do also think it's essential to also remember that some supplements (and even things like grapefruit!) can have detrimental interactions with certain medications or be contraindicated in certain conditions.

I guess my emphasis is, that as with most things in this life....balance is key!

OK, off my soapbox for now

I do hope and pray for all members here that protection against this virus will be high and contraction rates low.