PMC:7060038 / 38572-38707
Annnotations
LitCovid-PD-CLO
{"project":"LitCovid-PD-CLO","denotations":[{"id":"T132","span":{"begin":3,"end":9},"obj":"http://purl.obolibrary.org/obo/CLO_0001658"}],"text":"om active surveillance of passengers on cruise ships or repatriation flights, we estimate that up to half of cases show no detectable s"}