Incidence of SARS-CoV-2 infection in close contacs. Telephone follow-up in Primary Care

Baena-Díez, José Miguel; Pinnegar, Harriet Phyllis; Paredes-Millán, Mileydy Katterin; Plaza-Cerrato, Laura; Palomino-Español, Elena; Cots, Josep María

Objective To study the incidence of infection in close contacts with patiens with SARS-CoV-2 infection using a telephone monitoring protocol after the recommendation of isolation and quarantine at home. Patients and methods Cohort study, with 124 patients older than 15 years, included consecutively, asymptomatic at the time of the consultation, who had had close contact (<2 meters) with confirmed or possible cases of SARS-CoV-2 infection. The intervention consisted of 2 weeks of home isolation and quarantine, contacting by phone on days, 2, 4, 7 and 14 after the contact. The event of interest was the appereance of symptoms compatible with SARS-CoV-2 infection. Results The average age was 45.1 years (55.6% women); 328 phone calls were made (average 2.6 calls for patient). After 2 weeks of follow-up, 6 patients developed symptoms, confirming serologically or by PCR in 3 of them (2.4%, CI 95%: 0.8-6.9). Conclusions The incidence of SARS-CoV-2 infection in close contacts is low 2 weeks after home isolation and quarantine at home.