As the holiday shopping season picks up, retailers across the country hope to get a lift from another wave of spenders: international tourists who can visit the U.S. once again. Starting Monday, the Biden administration will allow visitors from abroad into the country again. Most foreign travelers from more than 30 countries, including the U.K. and Brazil, have been restricted since early 2020, as Covid-19 cases rose globally. Visitors must be fully vaccinated against Covid and have a negative Covid test within three days before departure. Exemptions apply to travelers under the age of 18, if they have medical reasons preventing them from getting a vaccine, or are traveling from one of 50 countries with low vaccine availability. Read more at CNBC.