Infectious viral shedding of SARS-CoV-2 Delta following vaccination: A longitudinal cohort study

被引：31

作者：

Garcia-Knight, Miguel ^{[1
]}

Anglin, Khamal ^{[2
,3
]}

Tassetto, Michel ^{[1
]}

Lu, Scott ^{[2
,3
]}

Zhang, Amethyst ^{[1
]}

Goldberg, Sarah A. ^{[2
,3
]}

Catching, Adam ^{[1
]}

Davidson, Michelle C. ^{[4
]}

Shak, Joshua R. ^{[4
,5
]}

Romero, Mariela ^{[2
,3
]}

Pineda-Ramirez, Jesus ^{[2
,3
]}

Diaz-Sanchez, Ruth ^{[2
,3
]}

Rugart, Paulina ^{[2
,3
]}

Donohue, Kevin ^{[4
]}

Massachi, Jonathan ^{[4
]}

Sans, Hannah M. ^{[4
]}

Djomaleu, Manuella ^{[4
]}

Mathur, Sujata ^{[2
,3
]}

Servellita, Venice ^{[6
]}

McIlwain, David ^{[7
]}

Gaudiliere, Brice ^{[7
]}

Chen, Jessica ^{[2
,3
]}

Martinez, Enrique O. ^{[2
,3
]}

Tavs, Jacqueline M. ^{[2
,3
]}

Bronstone, Grace ^{[2
,3
]}

Weiss, Jacob ^{[2
,3
]}

Watson, John T. ^{[8
]}

Briggs-Hagen, Melissa ^{[8
]}

Abedi, Glen R. ^{[8
]}

Rutherford, George W. ^{[2
,3
]}

Deeks, Steven G. ^{[9
]}

Chiu, Charles ^{[6
]}

Saydah, Sharon ^{[8
]}

Peluso, Michael J. ^{[9
]}

Midgley, Claire M. ^{[8
]}

Martin, Jeffrey N. ^{[2
]}

Andino, Raul ^{[1
]}

Kelly, J. Daniel ^{[2
,3
,5
,10
]}

机构：

[1] UCSF, Dept Microbiol & Immunol, San Francisco, CA 94143 USA

[2] Univ Calif San Francisco, Dept Epidemiol & Biostat, San Francisco, CA 94143 USA

[3] Univ Calif San Francisco, Inst Global Hlth Sci, San Francisco, CA 94143 USA

[4] Univ Calif San Francisco, Sch Med, San Francisco, CA USA

[5] San Francisco VA Med Ctr, San Francisco, CA 94121 USA

[6] UCSF, Div Infect Dis, San Francisco, CA USA

[7] Dept Microbiol & Immunol, Stanford, CA USA

[8] CDC, Resp Viruses Branch, Div Viral Dis, Atlanta, GA USA

[9] UCSF, Div HIV Infect Dis & Global Med, San Francisco, CA USA

[10] Univ Calif San Francisco, FI Proctor Fdn, San Francisco, CA 94143 USA

来源：

PLOS PATHOGENS | 2022年 / 18卷 / 09期

关键词：

D O I：

10.1371/journal.ppat.1010802

中图分类号：

Q93 [微生物学];

学科分类号：

071005 ; 100705 ;

摘要：

The impact of vaccination on SARS-CoV-2 infectiousness is not well understood. We compared longitudinal viral shedding dynamics in unvaccinated and fully vaccinated adults. SARS-CoV-2-infected adults were enrolled within 5 days of symptom onset and nasal specimens were self-collected daily for two weeks and intermittently for an additional two weeks. SARS-CoV-2 RNA load and infectious virus were analyzed relative to symptom onset stratified by vaccination status. We tested 1080 nasal specimens from 52 unvaccinated adults enrolled in the pre-Delta period and 32 fully vaccinated adults with predominantly Delta infections. While we observed no differences by vaccination status in maximum RNA levels, maximum infectious titers and the median duration of viral RNA shedding, the rate of decay from the maximum RNA load was faster among vaccinated; maximum infectious titers and maximum RNA levels were highly correlated. Furthermore, amongst participants with infectious virus, median duration of infectious virus detection was reduced from 7.5 days (IQR: 6.0-9.0) in unvaccinated participants to 6 days (IQR: 5.0-8.0) in those vaccinated (P = 0.02). Accordingly, the odds of shedding infectious virus from days 6 to 12 post-onset were lower among vaccinated participants than unvaccinated participants (OR 0.42 95% CI 0.19-0.89). These results indicate that vaccination had reduced the probability of shedding infectious virus after 5 days from symptom onset.

引用

页数：17

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