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...Samples to be collected for covid testing essential throat swab oropharyngeal nasal nasopharyngeal other preferred bronchoalveolar lavage tracheal aspiratewide mouth sterile plastic containers sputum in lab confirmed patients blood stool and urine wide personal protective equipment who interim guidance document rational use of coronavirus disease collection op np swabs optimal timing within days symptom onset no later than preferably prior initiation antimicrobial chemoprophylaxis or therapy from positive cases sample all plasma edta vials resin separator tubes serum specimen a bsl containment level is required handle suspected consider specimens as potentially hazardous infectious with gloves secure manner place each into separate container labeled the patient s name identification number site date time do not contaminate outside laboratory requisition forms...