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Kuyesa kwa PCr mwachangu nylon kunasungidwa nasal swab nasopharyngeal zitsanzo sonkhanitsani swab
Swab yotsekedwa ndiyabwino kutola maselo ambiri ndikuwugwiritsa ntchito mofulumira kwa ziganizo zomwe nthawi yomweyo imatulutsa maselo mu diat sing'anga.
Magulu a Shanghai amapereka kampani
