Florida has joined the ranks of New Jersey and New York, requiring a mandatory 21 day quarantine of people returning from Ebola stricken countries in West Africa.

[Florida Governor Rick] Scott signed an executive order mandating twice-daily health evaluations of anyone who has come from Guinea, Liberia and Sierra Leone. Four known individuals fall into that category in Florida, Scott said in a news release.

Scott made the decision, pushing back because the CDC has declined to identify risk levels of people who have returned from those three African countries.

“I want to be clear that we are taking this aggressive action at the state level out of an abundance of caution in the absence of much-needed Ebola risk classification information from the CDC,” Scott said in the news release.

Florida is one of the states that receive passengers returning from countries with an Ebola outbreak.

“We are using what information is available to our Department of Health through the CDC’s Epi-X web-based system, which monitors individuals who travel to areas with infectious diseases, including Ebola,” Scott said. “Using this system, we know that four individuals have already returned to Florida after traveling to Ebola-affected areas.