The Effect of Arrival Quarantine on Subsequent COVID-19 Testing in a Cohort of Military Basic Trainees
59th MDW San Antonio United States
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The COVID-19 pandemic has been associated with significant spread in congregate settings and various forms of non-pharmaceutical interventions NPI have been implemented to prevent spread. Basic Military Training at Joint Base-San Antonio is the entrance to the US Air Force and has been associated with respiratory outbreaks in the past. A two-week arrival quarantine was implemented in March 2020. Effects on subsequent testing for COVID-19 after an arrival quarantine is unknown. The first four weekly cohorts of trainees who underwent an arrival quarantine between March 16-April13 were monitored during their 7 week training for COVID-19 symptoms. Symptoms, medical testing, and days removed from training were collected on every patient with possible COVID-19 symptoms including cough, shortness of breath, or fever. Testing during the two-week arrival quarantine were compared to the subsequent five weeks of training. Nominal variables were compared by chi squared or Fishers exact test as appropriate. Continuous variables were compared by Mann-Whitney U Test. A total of 2,573 started training during study period, 893.4 percent had symptoms concerning for COVID-19 and were tested. 56 percent patients tested positive, all of whom in the arrival quarantine. Compared to patients who completed quarantinen29, patients in the arrival quarantine who tested negative for COVID-19n54were tested more often 26 trainees a week vs. 5.8 later in training, pless than 0.01, and received more rapid flu tests 74 percent vs. 38 percent, p less than 0.01and multiplex respiratory PCR 15 percent vs. 0 percent, p0.05.Trainees in quarantine were isolated longer for symptoms than patients who completed quarantinemedian 3 vs. 2, p0.01. There was no difference in presenting symptoms for trainees in quarantine or after quarantine.