On March 2, 2020, the Central Epidemic Command Center announced the 41st confirmed case of coronavirus disease 2019 (COVID-19) in Taiwan. Case #41 is the daughter (in her 20s) of Case #34. Case #41 had neither recent travel history nor physical discomfort before her diagnosis. Case #41 visited and kept Case #34 company in the hospital many times from February 15 to 26. As health agencies identified her as a contact of Case #34, Case #41 tested for COVID-19, and was placed in an isolation ward February 28. Her preliminary test came back negative whereas her confirmatory test result was positive. She was diagnosed with the novel coronavirus March 2.