I've gotten my 3rd as soon as they (FDA or CDC, can't remember) allowed it for people at risk (I'm a transplant patient and immunocompromised..I got mine back in the 3rd week of August. If they say my group can get a 4th, you better believe I'll be making my appointment as soon as they open them up in my county at the federal building/courthouse/medical commission office. If I have to get 2 a year, I'll be happy to do it.
When one doesn't have a functioning immune
system like myself (it's turned off due to the medication I take, so my immune system doesn't attack my liver I got 18+ years ago), you do what's necessary to stay safe.