13 sailors from USS Theodore Roosevelt test positive after recovering

[still_one]

2. From my understanding that to determine if a person has tested positive for Covid 19

they need to test negative twice within a 24-48 hour period to determine if they have recovered

"Medically, a person must be fever-free without fever-reducing medications for three consecutive days. They must show an improvement in their other symptoms, including reduced coughing and shortness of breath. And it must be at least seven full days since the symptoms began.
In addition to those requirements, the CDC guidelines say that a person must test negative for the coronavirus twice, with the tests taken at least 24 hours apart.
Only then, if both the symptom and testing conditions are met, is a person officially considered recovered by the CDC.
This second testing requirement is likely why there were so few official recovered cases in the US until late March. Initially, there was a massive shortage of testing in the US.
So while many people were certainly recovering over the last few weeks, this could not be officially confirmed. As the country enters the height of the pandemic in the coming weeks, focus is still on testing those who are infected, not those who have likely recovered."

https://www.sciencealert.com/this-is-what-it-means-to-recover-from-corona-and-what-you-can-do-after