Fig. 1

Flow Chart for Health Surveillance Program pathways and recovery assessment strategy involved in the study. SW: swab-based strategy; SY10-17: symptoms-based strategy with swabs scheduled at 10 and 17 days; SY14-17: symptoms-based strategy with swabs scheduled at 14 and 17 days; SY17: symptoms-based strategy with one swab at 17 days. *Fever or chills, cough, shortness of breath or difficulty breathing, fatigue, muscle or body aches, headache, new loss of taste or smell, sore throat, congestion or runny nose, nausea or vomiting, diarrhea [15]. **From first positive swab or symptoms onset (with at least 7 days symptoms-free)