Do it for your own safety.
Americans are plague rats.
we are also the current epicenter for human cases of H5N1...
When you combine that with how easy it has been in recent years for US residents to purchase fake vaccine records...
Other countries would be smart to start closing their borders to US residents.
Update... relevant thing that came through my feed today:
https://cepi.net/world-should-prepare-now-potential-h5n1-flu-pandemic-experts-warn
That's OK - in Europe we're already vaccinated for tuberculosis and measles...