Florida Governor Ron DeSantis, center, speaks about coronavirus cases at a news conference in Tampa, Florida on March 2.

There is still no clue as to how an individual in Manatee County, Florida, acquired the novel coronavirus that has now infected more than 90,000 people globally.

According to a source with knowledge of the situation, contact tracing for the infected person has failed to reveal any potential source of infection.

They have had no travel to any affected regions, nor have they had any contact with an individual who tested positive. Although the individual lives in Manatee County, the source says they are believed to have gone to an ER at a hospital in nearby Sarasota County, Florida earlier in the week.

But the individual was only tested for the virus on Saturday, after Florida expanded its testing criteria on Friday evening.

That means any healthcare worker who had been treating the patient, without the proper protection, was at danger of being exposed to the virus.