Hello, Rob and welcome to Mayo Connect. We are a community of patients and caregivers who try to help one another along the way, not medical professionals.

The most usual advice for people with lung problems, including MAC, is to stay up to date on all vaccines if your health permits. This helps you resist all the other "bugs" out there, that can really knock you down when your body is already fighting one infection. Since you are already current with your other vaccines, I assume you don't have adverse reactions, which is good.

My own inclination, since the RSV vaccine is new and I don't know whether or how severely I might react, was to have that vaccine separately, at least a week before either the new Covid booster or the flu shot. This week, my clinic issued exactly that guidance.

Also, in most parts of the country, it is a few weeks too early to get the flu vaccine as it's potency wanes week by week. So I will be getting my RSV shot this week, followed by Covid, then flu, 10 days or so apart. Inconvenient, but that is to avoid "stacking" reactions, which I know will happen to me.

The "gold standard" is of course, to ask your doctor - which you can do by way of a message - you don't need to wait for an appointment.
Sue