Without going into complex concepts, immunity is a system that has various components of protection, each of which is responsible for protection against a certain type of infection.
The main components of protection against viruses are the NK (natural killers) and Th1 (T-helpers-1) cell lines . Roughly speaking, if these components dominate in your immunity, then viral infections will be mild or asymptomatic, but on the other hand, there is a risk of autoimmune reactions.
Other cell lines, such as B cells (which produce antibodies), as well as Th2 (T-helpers-2) , etc., for the most part "work" with bacteria, fungi, parasites, but do not cope with viruses (hello covid :)). That is why all sorts of "measurements of the strength" of immunity against viruses (or after vaccination) through antibodies are complete nonsense.
From a practical point of view, it is primarily important to determine your individual activity of some components against the background of others. For example, there are people whose immunity copes well with bacteria, but does not "take out" viruses, and vice versa. This can be done with the help of an immunogram, which can be done in any civilian laboratory. This analysis will show the concentration of all the main immune cells, as well as their ratio.
Next, if we see the dominance of the components that are responsible for bacteria, then we need to transfer immunity to the dominance of the components of viral protection. How to do this? - Drink certain supplements (google " th1 th2 supplements " and " NK cell-activating compounds ").
Personally, I use NOW IMMUNE RENEW . However, any supplement with a large amount of Astragalus membranaceus plant extract (Astragalus membranaceus) has the properties of stimulating the components of viral immunity protection.
Links to evidence:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8324177/
https://www.mdpi.com/2227-9059/10/2/296
https://www.nature.com/articles /s41423-021-00825-2
https://pubmed.ncbi.nlm.nih.gov/34695836/
https://pubmed.ncbi.nlm.nih.gov/15015443/
https://pubmed.ncbi.nlm.nih.gov/17361521/
https://pubmed.ncbi.nlm.nih.gov/12205961/
