If you truly only get a CBC @Lon Tanner it is only a blood count and will not give you any info on blood chemistry and vitamin levels. It may hint at iron deficiency and perhaps copper intake but won't give specific info. Another comment on supplements is if you are taking fat-soluble vitamins, be sure you have adequate fat in the food with which you are ingesting the supplement. Vitamin D, for example, won't be absorbed without fat or oil to process it with.
Ever since Dr. Fauci released his virus on the world, I have been taking what I consider to be reasonable supplements to boost my immune system. My wife and I are scheduled for an antibodies test in a week or so to determine whether we have already had the virus since most people I know who have had COVID have barely noticed it, or wouldn't have noticed it if they hadn't been tested. I have had the usual number of colds the past couple of years, and one of them might well have been COVID. I hope I find that I have had it because, according to an Israeli study, natural immunity is almost thirty percent more effective than the vaccine. It also seems that the vaccine can only make you sick or weaken your immune system if you have already developed natural immunity.
Do you know if they have reporting requirements for any such test results, since a positive test means another case confirmed. Maybe I'll have to travel out-of-state to get this done. Ignore this if it's a breach of OPSEC.
I don't know about other places, but they are saying that there will be no reporting of private pay test results, because they are not testing for the presence of the virus, which probably would have to be reported, but of the antibodies.
I think the idea is that it can't help you but it could hurt you. Still, they are mandating it just so that they can have a record of who has been vaccinated for the purpose of vaccine passports, and so on.
It can cause immune overload and you may become more sick than if you just trusted your natural immunity. I am convinced that it is part of the cause for so many new cases of Covid. One dose of the mRNA vaccine makes you more susceptible to the virus, but the second dose makes you less susceptible approximately two weeks after the second shot. If you have already had the virus, however, your system reacts to the vaccine in a completely different manner and you become more susceptible to a serious case. That is what my reading has lead me to believe anyway. Make your own decision.
I have listened to virologists and immunologists who are generally in favor of vaccines saying that it doesn't make any sense for someone who has already had the virus to be vaccinated, the general idea being that it could only weaken your immune system.