Close contacts of coronavirus disease (COVID-19) patients are at high risk for severe acute respiratory syndrome 2 (SARS-CoV-2) infection. We assessed the seroprevalence of SARS-CoV-2–specific antibodies among quarantined close contacts of COVID-19 patients in the Faroe Islands. We invited quarantined close contacts of COVID-19 index patients identified during March 3–April 22, 2020, to participate in this study; 584 (81%) contacts consented and underwent serologic testing. Among the 584 participants, 32 (5.5%) were seropositive for total antibody against SARS-CoV-2. Household and young or elderly contacts had higher risk for seropositivity than other contacts. We found a secondary attack rate of 19.2%. Seroprevalence among close contacts was almost 10-fold higher than among the general population of the Faroe Islands. Regularly testing household close contacts of COVID-19 patients might help track the transmission of SARS-CoV-2.
【저자키워드】 COVID-19, 2019 novel coronavirus disease, coronavirus disease, severe acute respiratory syndrome coronavirus 2, viruses, respiratory infections, zoonoses, antibodies, SARS-CoV-2, Coronaviruses, quarantine, Seroprevalence, secondary attack rate, SARS-CoV-2 seroprevalence, close contacts, Faroe Islands, 【초록키워드】 antibody, Infection, household, Patient, General population, seropositive, serologic testing, close contact, Contact, COVID-19 patient, high risk, acute respiratory syndrome, Participants, higher risk, help, transmission of SARS-CoV-2, SARS-CoV-2–specific antibody,