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An employee of Denver International Airport is reported to be a ‘presumptive positive’ case of Covid-19, while two immigration officers of Bangkok’s main airport have also tested positive for the coronavirus.

The test of the Denver Airport employee was carried out at the state level and now will be sent to the Centers for Disease Control and Prevention for final confirmation, officials were quoted by as saying.

The employee is currently symptomatic and has been kept in isolation from others.

US health officials have begun contact tracing. Several first responders in Denver who were recently exposed to the presumptive positive person have been notified.

The responders have been asked to self-quarantine for up to 14 days.

Meanwhile, two immigration officers at Suvarnabhumi Airport in Bangkok are reported to be positive for Covid-19.

According to health officials, these officers may have handled the passports of visitors to Thailand, reported

The officers fell ill on 7 and 8 March respectively and could have come into contact with arriving passengers before they were diagnosed.