PCR test can remain positive for months due to dead virus in the nasal passages. The positive does not mean that you have illness nor that you are contagious. If an antigen test is acceptable for clearance for travel, you should try to get that. Visit this site for more info: https://www.cdc.gov/coronavirus/2019-ncov/travelers/testing-international-air-travelers.html Wish you good health.
Answered 1/26/2022
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