medical uk healthcare technologist holding covid-19 swab collection kit

covid coronavirus pcr swab test kit doctor laboratory coveralls pandemic patient analysis care cdc clinic contamination corona detection diagnostic disease epidemic equipment hazmat health hospital lab medical nasal nasopharyngeal negative nose oral paramedic positive ppe protective research result saliva specimen staff suit throat tube virus world organization healthcare technologist holding covid-19 collection kit wearing white mask glove test taking sample pcr dna testing protocol process