@johnhester, see this related discussion:
- Is it safe to get the Corona Virus (COVID-19) vaccine with PMR?: https://connect.mayoclinic.org/discussion/pmr-and-corona-virus-vaccine/

I also found this information:
EXERPT
Reference: "Can I have the vaccine if I am taking steroids?
It’s fine for you to have the vaccine while you’re taking steroids. There’s no reason to delay the vaccine if you’re taking steroids, or have recently had a steroid injection or finished a course of steroid treatment.

Taking steroids as tablets, liquids, injections or drips might mean that your immune system doesn’t respond as well to the vaccine as someone who isn’t taking these drugs. This means that you may be advised to follow advice on shielding and social distancing guidance after you have had it and if you may need a third dose of the vaccine as part of your initial course. Steroid creams or eye drops should not affect your immune system or response to the vaccine.

Your healthcare team might want to discuss delaying a dose of steroids or a steroid injection with you, especially if there is a high risk of getting COVID-19. It’s important that you don’t stop taking your steroid medication without speaking to a healthcare professional, as this can leave you at risk of having a flare-up, which can increase your risk of COVID-19." Read more here:
-- Vaccines for COVID-19 – your questions answered: https://versusarthritis.org/covid-19-updates/vaccines-for-covid-19-your-questions-answered/

Has your doctor suggested that you get the updated COVID shot?