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TROY, N.Y.— Three people who were on a recent Delta Airlines flight traveling to upstate New York have tested positive for COVID-19, officials said.

The three residents from Troy, New York traveled on Delta Airlines flight 4815 from Georgia to Albany on July 6, according to the Rensselaer Health Department.

All three became symptomatic the next day, according to health officials.

It was not immediately known when the passengers were infected or whether or not they have any relation to each other.

Any passengers who were on the flight are advised to call their home county’s health department.

There are currently 38 active cases in the county, according to the health department. The total number of coronavirus cases the county has reported since the outbreak is at 642, health officials said.

The governors of New York, New Jersey and Connecticut imposed a 14-day quarantine on people traveling to the tri-state area from states with a high transmission rate of coronavirus last week.

There are 22 states currently on the list, including Georgia.