My Primary Care Physician instructed me to space vaccines about two weeks apart.
I'm glad you're getting those vaccines.
I hear people debate whether we should get 2 or more vaccines at the same time or different times, and even whether they should get them in the same arm or different arms. Does combing 2 or more vaccines into one injection site generate more inflammation, and aid in developing a more potent immune response – the real goal of the vaccination?
This is besides the point. Just be sure to get those vaccinations. Varying the locations & timing of those shots will have only a minor effect, if any. If doing any of that makes getting those shots possible for you, good.
It reminds me of the early days of the Covid-19 pandemic. The internet was full of mistaken, absurd, or plain bad advice over what to do. A good friend sent me a panicky sounding email how I must avoid taking ibuprofen (Advil and the like) if I feel a fever coming on. It would make Covid-19 much worse, even lethal!
Apparently the thinking behind this bad idea went like this. Ibuprofen, aspirin, or acetaminophen (non-steroidal anti-inflammatory drugs, NSAIDS) are effective at temporarily reducing a fever and other flu-like symptoms we feel when we are coming down with a virus infection. But, we are also told that fever is one of our immune system's weapons against virus infections. If we reduce that fever, do we harm ourselves while helping the virus?
Of course not. Too much fever & inflammation can itself be harmful. NSAIDS can help us endure some of the miseries of fever & inflammation. It does not enhance the virus in the ongoing battle of the virus vs. the immune system.
Now we have a different version of that same silly debate: One arm for both vaccines, or two separate arms? It's really no different than avoiding NSAIDS if we're coming down with a virus infection. Both are wrong. Initial inflammation because of a vaccination or a virus infection is not a simple ON/OFF switch for the entire immune system. The immune system is far more complex than that.