coronavirus covid test concept doctor hand with glove holding tube patient nasal secretion sample for virus |
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| navigate by keyword : analysis care clinic contagious contamination corona coronavirus covid diagnostic disease doctor epidemic equipment hand health holding hospital illness infection lab label laboratory medical nasal outbreak pandemic pathogen patient physician positive prevent process protect research result risk sample science secretion sick specimen test transmission treat tube vaccine virus |
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| Coronavirus COVID-19 test concept. doctor`s hand with glove holding test tube with patient nasal secretion sample for corona virus infection test with positive result label at hospital laboratory |
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