Mexico doesn't give a damn, generally speaking. I'm guessing I'll be able to walk right in but will need the vax certificate to get back into the US.

I have no way to check on things in person here anymore. I have a good friend that was a long time ER and palliative care nurse but she retired. I'm guessing that hospitalizations are over numbered because there is Federal Funding to cover shortfalls on CV and not on flu or pneumonia.