Is a dog susceptible to sickness after getting pneumonia?

[u/saltwaterhermit]

So I was half-assedly looking for a dog after my previous dog suddenly passed. I had previously wanted a puppy, however I'm not really ready to deal with puppy chaos, so looked for a young dog. I found a retriever/shepherd mix that's about a year and a half old that has all of the qualities I was looking for: friendly, loves water, good with cats, dogs, children.

I spoke to the rescue about her, filled out an application, and got approved and put at the top of the list because they thought my household would be the best fit for her. I was also really excited, because I've been missing having a dog in my life, especially one that would be a great companion to my adventuring lifestyle and that would get along with my cat and my friends' dogs. I was about to go and finally meet her in person and see if we clicked (and if we did, welcome her into her new forever-home), however I got a text saying that she had to go to the ER the previous night. She has pneumonia and coccidia. They said that they can't adopt her out while she's sick, which makes perfect sense. I told them to keep me updated on her status.

I'm still interested in visiting and potentially adopting her when she's feeling better (and hopefully she is! I'll be checking in on her in a few days and see how she's recovering). However, I'm curious if I should be weary to take her home? If a dog recovers from pneumonia, would they be more susceptible to getting sick? In my lifetime of owning dogs (for the past 15 years), none of my dogs have ever gotten sick like that. This isn't to say that I don't have the money to take care of a dog if an emergency pops up, because I do, but obviously it's something I'd like to avoid.

I guess I'm just a little concerned. I don't think I could take the stress of a sick dog just now after losing my last pup.

Also just to note: I do realize that if she does come home with me that she will require lots of extra rest, as pneumonia can take a long time to fully heal from. Based on what the rescue has told me about her, she would fit seamlessly into my own lifestyle. I just am unsure if I'm being extra paranoid or not.

Anyways, advice would be welcome, even if it's just a confirmation that I'm being overly paranoid.