That's not a given. How strong an immunity you develop from getting a disease varies widely depending on how your case plays out.

Here's an article I just came across today on this [1]. It is originally from the NYT, but I saw it reprinted in the Seattle Times so that's where I'm linking (and I think their paywall is more lenient).

https://www.seattletimes.com/nation-world/if-youve-already-h...