July 13 (UPI) -- Health officials in Chicago issued a travel warning for the states of Missouri and Arkansas on Tuesday amid rising COVID-19 cases.
The city said that unvaccinated people traveling from Missouri or Arkansas are advised to obtain a negative COVID-19 test no more than 72 hours before arriving in Chicago or quarantine for a 10-day period upon arrival as the two states have reported more than 15 cases per day, per 100,000 residents.
Tuesday marks the first time a state has been placed under a travel advisory since June 1.
"The COVID-19 pandemic is not over, and this only goes to show that the virus is still very much a threat that we must all remain vigilant against it," Chicago Health Commissioner Dr. Allison Arwady said, according to NBC News. "That means getting vaccinated and wearing a mask in public settings if you are not fully vaccinated."
The increase in cases comes as the Delta variant has spread throughout the nation, accounting for 51.7% of new COVID-19 cases as of July 3.
Last week, President Joe Biden called for a shift in the nation's vaccination efforts from mass vaccination sites to more targeted outreach of those who remain unvaccinated amid concerns over variants and a failure to reach his goal of 70% of all adults to have at least one dose by Independence Day.
As of Tuesday, 67.7% of American adults had received at least one vaccine dose and 159,675,163 people have been fully vaccinated, according to the Centers for Disease Control and Prevention.