analyzed(6) COVID-19(6) Conjunctival swab(3) reducing(3) conjunctival swabs(3) SARS-CoV-2 RNA(3) creating(3) polymerase chain(3) elevated(3) threshold(3) aerosol(3) SARS-CoV-2 viral RNA(3) Healthcare workers(3) Effectiveness(3) Shield(3) Chain Reaction(3) healthcare worker(3) previous study(3) Result(3) healthy control(3) polymerase chain reaction(3) reduced(3) laboratory-confirmed(3) Next-generation sequencing(3) large cohort(3) were recorded(3) ocular(3) performed(3) multiplex(3) Relevance(3)