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Cross-Neutralizing Activity Against SARS-CoV-2 Variants in COVID-19 Patients: Comparison of 4 Waves of the Pandemic in Japan.
Furukawa, Koichi; Tjan, Lidya Handayani; Sutandhio, Silvia; Kurahashi, Yukiya; Iwata, Sachiyo; Tohma, Yoshiki; Sano, Shigeru; Nakamura, Sachiko; Nishimura, Mitsuhiro; Arii, Jun; Kiriu, Tatsunori; Yamamoto, Masatsugu; Nagano, Tatsuya; Nishimura, Yoshihiro; Mori, Yasuko.
  • Furukawa K; Division of Clinical Virology, Center for Infectious Diseases, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan.
  • Tjan LH; Division of Clinical Virology, Center for Infectious Diseases, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan.
  • Sutandhio S; Division of Clinical Virology, Center for Infectious Diseases, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan.
  • Kurahashi Y; Division of Clinical Virology, Center for Infectious Diseases, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan.
  • Iwata S; Division of Cardiovascular Medicine, Hyogo Prefectural Kakogawa Medical Center, Kakogawa, Hyogo, Japan.
  • Tohma Y; Acute Care Medical Center, Hyogo Prefectural Kakogawa Medical Center, Kakogawa, Hyogo, Japan.
  • Sano S; Acute Care Medical Center, Hyogo Prefectural Kakogawa Medical Center, Kakogawa, Hyogo, Japan.
  • Nakamura S; Division of General Internal Medicine, Hyogo Prefectural Kakogawa Medical Center, Kakogawa, Hyogo, Japan.
  • Nishimura M; Division of Clinical Virology, Center for Infectious Diseases, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan.
  • Arii J; Division of Clinical Virology, Center for Infectious Diseases, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan.
  • Kiriu T; Division of Respiratory Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan.
  • Yamamoto M; Division of Respiratory Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan.
  • Nagano T; Division of Respiratory Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan.
  • Nishimura Y; Division of Respiratory Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan.
  • Mori Y; Division of Clinical Virology, Center for Infectious Diseases, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan.
Open Forum Infect Dis ; 8(10): ofab430, 2021 Oct.
Article in English | MEDLINE | ID: covidwho-1462455
ABSTRACT

BACKGROUND:

As of March 2021, Japan is facing a fourth wave of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. To prevent further spread of infection, sera cross-neutralizing activity of patients previously infected with conventional SARS-CoV-2 against novel variants is important but has not been firmly established.

METHODS:

We investigated the neutralizing potency of 81 coronavirus disease 2019 (COVID-19) patients' sera from the first to fourth waves of the pandemic against SARS-CoV-2 D614G, B.1.1.7, P.1, and B.1.351 variants using their authentic viruses.

RESULTS:

Most sera had neutralizing activity against all variants, showing similar activity against B.1.1.7 and D614G, but lower activity especially against B.1.351. In the fourth wave, sera-neutralizing activity against B.1.1.7 was significantly higher than that against any other variants, including D614G. The sera-neutralizing activity in less severe patients was lower than that of more severe patients for all variants.

CONCLUSIONS:

The cross-neutralizing activity of convalescent sera was effective against all variants but was potentially weaker for B.1.351. The high neutralizing activity specific to B.1.1.7 in the fourth wave suggests that mutations in the virus might cause conformational change of its spike protein, which affects immune recognition of D614G. Our results indicate that individuals who recover from COVID-19 could be protected from the severity caused by infection with newly emerging variants.
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Full text: Available Collection: International databases Database: MEDLINE Type of study: Randomized controlled trials Topics: Variants Language: English Journal: Open Forum Infect Dis Year: 2021 Document Type: Article Affiliation country: Ofid

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Full text: Available Collection: International databases Database: MEDLINE Type of study: Randomized controlled trials Topics: Variants Language: English Journal: Open Forum Infect Dis Year: 2021 Document Type: Article Affiliation country: Ofid