The unidentified HCW left Jeddah, Saudi Arabia and flew to London on May 1st, and began to feel unwell on the flight. He then flew on to Boston, then Atlanta, and finally arrived in Orlando Florida. The CDC is doing airline contact tracing for those who may have had close exposure to this patient (a number that could approach 500 contacts on US flights alone).
The patient went to a local Emergency Room on May 8th, was admitted, and state public health testing subsequently identified this patient as being infected with the virus. The CDC confirmed the results last night.
The press conference was conducted by CDC director Dr. Tom Frieden, Dr. Anne Schuchat, and Florida Surgeon General John H. Armstrong, who all stressed that the risk to the general public is extremely low.