Right, there isn't a whole lot that we know about it yet. Only people with severely weakened immune systems could catch the exact same strain twice. That is true for all viruses that we know about so far. If it mutates on an annual basis then that means that it's just something that we will always have to deal with. Most think that Corona virus will not mutate like the flu or common cold and that it will just cycle through in a few years and will mostly be a bad memory.
On another note; shelter in place orders violate the 1st, 5th, and 14th amendments, so they will be toast soon anyways.