Haplotype networks of SARS-CoV-2 infections in the Diamond Princess cruise ship outbreak

Tsuyoshi Sekizuka; Kentaro Itokawa; Tsutomu Kageyama; Shinji Saito; Ikuyo Takayama; Hideki Asanuma; Nao Naganori; Rina Tanaka; Masanori Hashino; Takuri Takahashi; Hajime Kamiya; Takuya Yamagishi; Kensaku Kakimoto; Motoi Suzuki; Hideki Hasegawa; Takaji Wakita; Makoto Kuroda

We did not find any area-specific events of COVID-19 spread in the DP because all COVID-19 40 patients were widely distributed in all 18 decks across the ship. This may indicate that most SARS-CoV-2 infections began at mass-gathering events in the recreational areas where all passengers enjoyed dancing, singing, shopping, and watching performances. The highest incidence of COVID-19 onset was observed on February 7; the epidemic curve in the latter half of the epidemic was dominated by crew members whose work was not strictly controlled to 45 maintain service on the ship (9). Nishiura suggested that the peak time of infection was from . CC-BY-NC 4.0 International license It is made available under a author/funder, who has granted medRxiv a license to display the preprint in perpetuity.