Sure, I can assist you with information on US visas for Swiss citizens.
Swiss citizens are eligible to enter the United States under the Visa Waiver Program (VWP) for business or tourism purposes for up to 90 days without obtaining a visa. However, they must obtain an Electronic System for Travel Authorization (ESTA) approval prior to their trip. The ESTA application can be completed online and must be done at least 72 hours before departure.
If a Swiss citizen plans to stay in the US for longer than 90 days, or for purposes other than business or tourism, they must obtain a US visa. The type of visa required will depend on the purpose of the visit. For example, if someone wants to work in the US, they will need to apply for a work visa. If someone wants to study in the US, they will need to apply for a student visa.
Swiss citizens can apply for a US visa at the nearest US embassy or consulate. The visa application process can be lengthy and requires documentation such as a valid passport, proof of financial support, and a letter explaining the purpose of the visit. It is important to apply for the visa well in advance of the intended travel dates.
I hope this information helps. Let me know if you have any further questions!