Figure 13.

Work-up algorithm for the study of close contacts of SC2 infection in sociosanitary centers.

^aDocumented history of COVID-19 in the previous 3 months; ^bDone in the previous 3 months, except in special cases; ^cOr not done; ^dAntigenic test or PCR depending on the availability of the tests. If the lag for PCR result is expected to be less than 24 hours, it is preferable to perform a baseline PCR. Otherwise, it will be preferable to chose antigen test, having to confirm negative results with PCR; ^ePositive antigenic test does not require PCR confirmation.