According to Tinker Air Force Base's Facebook page, today's COVID-19 case announcement is the first since the base confirmed three cases last week. 

The fourth case was a \"symptomatic member\" who was quarantined beginning March 16. 

The test results came back positive for COVID-19 on Tuesday. 

Base officials are tracing \"the member's recent movements and contacts in conjunction with affected units,\" according to the Facebook post. 

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