Abstract: ANTIVIRAL AGENTS crossm A Prospective, Randomized, Open-Label Trial of Early versus Late Favipiravir Therapy in Hospitalized Patients with COVID-19 Yohei Doi,a,b Masaya Hibino,c Ryota Hase,a,d Michiko Yamamoto,e Yu Kasamatsu,f Masahiro Hirose,g Yoshikazu Mutoh,h Yoshito Homma,i Masaki Terada,j Taku Ogawa,k Fumihiro Kashizaki,l Toshihiko Yokoyama,m Hayato Koba,n Hideki Kasahara,o Kazuhisa Yokota,p Hideaki Kato,q Junichi Yoshida,r Toshiyuki Kita,s Yasuyuki Kato,t Tadashi Kamio,u Nobuhiro Kodama,v Yujiro Uchida,w Nobuhiro Ikeda,x Masahiro Shinoda,y Atsushi Nakagawa,z Hiroki Nakatsumi,aa Tomoya Horiguchi,bb Mitsunaga Iwata,c Akifumi Matsuyama,cc Sumi Banno,dd Takenao Koseki,dd,ee Mayumi Teramachi,dd Masami Miyata,dd Shigeru Tajima,ff Takahiro Maeki,ff Eri Nakayama,ff Satoshi Taniguchi,ff Chang Kweng Lim,ff Masayuki Saijo,ff Takumi Imai,gg Hisako Yoshida,gg Daijiro Kabata,gg Ayumi Shintani,gg Yukio Yuzawa,hh Masashi Kondobb,dd a Departments of Microbiology and Infectious Diseases, Fujita Health University School of Medicine, Toyoake, Aichi, Japan b Division of Infectious Diseases, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA c Department of Emergency and General Internal Medicine, Fujita Health University School of Medicine, Toyoake, Aichi, Japan d Department of Infectious Diseases, Japanese Red Cross Narita Hospital, Narita, Chiba, Japan e Department of Respiratory Medicine, Sagamihara Kyodo Hospital, Sagamihara, Kanagawa, Japan f Infection Control and Clinical Laboratory, Kyoto Prefectural University of Medicine, Kyoto, Kyoto, Japan g Department of Respiratory Medicine, Fujita Health University Bantane Hospital, Nagoya, Aichi, Japan h Department of Infectious Diseases, Tosei General Hospital, Seto, Aichi, Japan i Department of Respiratory Medicine, Ehime Prefectural Central Hospital, Matsuyama, Ehime, Japan j Department of Respiratory Medicine, Saiseikai Niigata Hospital, Niigata, Niigata, Japan k Center for Infectious Diseases, Nara Medical University, Kashihara, Nara, Japan l Department of Respiratory Medicine, Isehara Kyodo Hospital, Isehara, Kanagawa, Japan m Department of Respiratory Medicine, Japanese Red Cross Nagoya Daiichi Hospital, Nagoya, Aichi, Japan n o Department of Rheumatology, NTT East Sapporo Hospital, Sapporo, Hokkaido, Japan p Department of Infectious Diseases, Tokyo Metropolitan Health and Medical Corporation Ebara Hospital, Ohta, Tokyo, Japan q Infection Prevention and Control Department, Yokohama City University Hospital, Yokohama, Kanagawa, Japan r Department of Chest Surgery, Shimonoseki City Hospital, Shimonoseki, Yamaguchi, Japan s Department of Respiratory Medicine, National Hospital Organization Kanazawa Medical Center, Kanazawa, Ishikawa, Japan t Department of Infectious Diseases, International University of Health and Welfare Narita Hospital, Narita, Chiba, Japan u Department of Intensive Care, Shonan Kamakura General Hospital, Kamakura, Kanagawa, Japan v Department of General Internal Medicine, Fukuoka Tokushukai Hospital, Kasuga, Fukuoka, Japan w Department of General Medicine, Kitakyushu Municipal Medical Center, Kitakyushu, Fukuoka, Japan x Department of General Internal Medicine, Eiju General Hospital, Taito, Tokyo, Japan y Department of Respiratory Medicine, Tokyo Shinagawa Hospital, Shinagawa, Tokyo, Japan z Department of Respiratory Medicine, Kobe City Medical Center General Hospital, Kobe, Hyogo, Japan aa Department of..