Generally speaking, individuals who are visiting the United States for more than 90 days or are arriving from a non-waiver country must apply for a visa or green card. Visas enable individuals to remain in the United States temporarily for specific activities, such as studying, working, or traveling. Foreign nationals, including relatives of permanent residents and citizens, who wish to live in the United States permanently, must apply for a green card. Usually, travelers must secure documents at a foreign consulate before traveling to the United States. An immigration attorney can provide specific advice regarding different types of visas and eligibility categories, as well as updates on immigration policy during the COVID-19 pandemic.