Before traveling to or settling in the USA, what vaccinations are legally required, and which are just recommended for general public health and safety? Are these requirements different for short-term tourists, long-term visitors, students, or immigrants? I also want to understand if proof of COVID-19 vaccination or any boosters is still mandatory in 2025. Where can I find the latest CDC or government guidelines on travel-related immunizations for foreign nationals? Will I need official documentation or translated vaccination records?