I've tested positive for covid-19 on jan 3rd after isolation i was meant to go back to work but my workplace requires a negative test before i can i consulted with my gp who advised me that re-testing will still show a positive result for weeks?

COVID 19: Agree with earlier response. "You can be PCR-positive for weeks to months but you probably aren’t infectious. You’re just shedding little bits of dead RNA. The test does not distinguish live virus from dead virus.” REF: https://www.aamc.org/news-insights/your-covid-19-testing-questions-answered . Recommend dr. provide note regarding clinical status if retest is positive.