Vaxx vs UnVaxxed Transmission
Increases in COVID-19 are unrelated to levels of vaccination across 68 countries and 2947 counties in the United States
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8481107/
No Significant Difference in Viral Load Between Vaccinated and Unvaccinated, Asymptomatic and Symptomatic Groups Infected with SARS-CoV-2 Delta Variant
https://www.medrxiv.org/content/10.1101/2021.09.28.21264262v1.full
August 1/2021
NIH-Dr Fauci on video.
"..But the mean, the sort of average or mean level of virus in the nasopharynx is really quite similar, almost identical on an average. So you would think, obviously, when you have biological variability, you're going to have some people high, some people low, some people in the middle. But the median or mean is going to be right there, which is very similar to the unvaccinated individual, which is troublesome, which tells you the potential for transmission is there.."
https://www.cbsnews.com/news/transcript-dr-anthony-fauci-face-the-nation-08-01-2021/
Vaccinated and unvaccinated individuals have similar viral loads in communities with a high prevalence of the SARS-CoV-2 delta
https://www.medrxiv.org/content/10.1101/2021.07.31.21261387v1?fbclid=IwAR2Si9cp3XGC6IDuPrpk7EbSE-cNtH-A9IGx4HmvSaQJDq7FmIln3gi0yFE
delta viral load in vaccinated and unvaccinated
https://www.cdc.gov/mmwr/volumes/70/wr/mm7038e1.htm
Shedding of Infectious SARS-CoV-2 Despite Vaccination
https://www.medrxiv.org/content/10.1101/2021.07.31.21261387v4.full.pdf
Delta viral load in vaccinated and unvaccinated
https://www.cdc.gov/mmwr/volumes/70/wr/mm7038e1.htm
Shedding of Infectious SARS-CoV-2 Despite Vaccination
https://www.medrxiv.org/content/10.1101/2021.07.31.21261387v4.full.pdf
Fully vaccinated people with Delta variant breakthrough infections can spread the virus to others. However, vaccinated people appear to spread the virus for a shorter time:
https://www.cdc.gov/coronavirus/2019-ncov/variants/delta-variant.html
Shedding of Infectious SARS-CoV-2 Despite Vaccination
https://www.medrxiv.org/content/10.1101/2021.07.31.21261387v4
A vaccine breakthrough infection happens when a fully vaccinated person gets infected with COVID-19. People with vaccine breakthrough infections may spread COVID-19 to others.
https://www.cdc.gov/coronavirus/2019-ncov/vaccines/effectiveness/why-measure-effectiveness/breakthrough-cases.html
Outbreak of SARS-CoV-2 Infections, Including COVID-19 Vaccine Breakthrough Infections, Associated with Large Public Gatherings - Barnstable County, Massachusetts, July 2021
https://pubmed.ncbi.nlm.nih.gov/34351882/
Transmission of SARS-CoV-2 Delta Variant Among Vaccinated Healthcare Workers, Vietnam
https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3897733
Live virus neutralization testing in convalescent patients and subjects vaccinated against 19A, 20B, 20I/501Y.V1 and 20H/501Y.V2 isolates of SARS-CoV-2
https://pubmed.ncbi.nlm.nih.gov/34176436/
Antigenic minimalism of SARS-CoV-2 is linked to surges in COVID-19
community transmission and vaccine breakthrough infections
https://www.medrxiv.org/content/10.1101/2021.05.23.21257668v3
Vaccinated and unvaccinated individuals have similar viral loads in communities with a high prevalence of the SARS-CoV-2 delta
https://www.medrxiv.org/content/10.1101/2021.07.31.21261387v1?fbclid=IwAR2Si9cp3XGC6IDuPrpk7EbSE-cNtH-A9IGx4HmvSaQJDq7FmIln3gi0yFE
Increases in COVID‐19 are unrelated to levels of vaccination across 68 countries and 2947 counties in the United States
https://link.springer.com/content/pdf/10.1007/s10654-021-00808-7.pdf
Outbreak of SARS-CoV-2 Infections, Including COVID-19 Vaccine Breakthrough Infections, Associated with Large Public Gatherings - Barnstable County, Massachusetts, July 2021
https://pubmed.ncbi.nlm.nih.gov/34351882/
Transmission of SARS-CoV-2 Delta Variant Among Vaccinated Healthcare Workers, Vietnam
https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3897733
Live virus neutralization testing in convalescent patients and subjects vaccinated against 19A, 20B, 20I/501Y.V1 and 20H/501Y.V2 isolates of SARS-CoV-2
https://pubmed.ncbi.nlm.nih.gov/34176436/
Shedding of Infectious SARS-CoV-2
Despite Vaccination
https://www.medrxiv.org/content/10.1101/2021.07.31.21261387v4.full.pdf
Transmission potential of vaccinated and unvaccinated persons infected with the SARS-CoV-2 Delta variant in a federal prison, July—August 2021
https://www.medrxiv.org/content/10.1101/2021.11.12.21265796v1.full
Conclusions As this field continues to develop, clinicians and public health practitioners should consider vaccinated persons who become infected with SARS-CoV-2 to be no less infectious than unvaccinated persons. These findings are critically important, especially in congregate settings where viral transmission can lead to large outbreaks.
The epidemiological relevance of the COVID-19-vaccinated population is increasing
https://www.thelancet.com/journals/lanepe/article/PIIS2666-7762(21)00258-1/fulltext
The epidemiological relevance of the COVID-19-vaccinated population is increasing
"Many decision makers assume that the vaccinated can be excluded as a source of transmission.."
https://www.thelancet.com/journals/lanepe/article/PIIS2666-7762(21)00258-1/fulltext
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Covid-19: Fully vaccinated people can carry as much delta virus as unvaccinated people, data indicate
Community transmission and viral load kinetics of the SARS-CoV-2 delta (B.1.617.2) variant in vaccinated and unvaccinated individuals in the UK: a prospective, longitudinal, cohort study
https://www.thelancet.com/journals/laninf/article/PIIS1473-3099(21)00648-4/fulltext
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An outbreak caused by the SARS-CoV-2 Delta variant (B.1.617.2) in a secondary care hospital in Finland, May 2021
https://www.eurosurveillance.org/content/10.2807/1560-7917.ES.2021.26.30.2100636
Virological and serological kinetics of SARS-CoV-2 Delta variant vaccine-breakthrough infections: a multi-center cohort study
https://www.medrxiv.org/content/10.1101/2021.07.28.21261295v1
Nosocomial outbreak caused by the SARS-CoV-2 Delta variant in a highly vaccinated population, Israel, July 2021
https://www.eurosurveillance.org/content/10.2807/1560-7917.ES.2021.26.39.2100822#html_fulltext
Large-scale study of antibody titer decay following BNT162b2 mRNA vaccine or SARS-CoV-2 infection
https://www.medrxiv.org/content/10.1101/2021.08.19.21262111v1
COVID-19 vaccine surveillance report
Week 42
The same report (Table 2, page 13), shows that in the older age groups above 30, the double vaccinated persons have greater infection risk than the unvaccinated, presumably because the latter group include more people with stronger natural immunity from prior Covid disease.
https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/1027511/Vaccine-surveillance-report-week-42.pdf
Outbreak of SARS-CoV-2 Infections, Including COVID-19 Vaccine Breakthrough Infections, Associated with Large Public Gatherings - Barnstable County, Massachusetts, July 2021
https://pubmed.ncbi.nlm.nih.gov/34351882/
No Significant Difference in Viral Load Between Vaccinated and Unvaccinated, Asymptomatic and Symptomatic Groups When Infected with SARS-CoV-2 Delta Variant
https://www.medrxiv.org/content/10.1101/2021.09.28.21264262v2
Comparing SARS-CoV-2 natural immunity to vaccine-induced immunity: reinfections versus breakthrough infections
https://www.medrxiv.org/content/10.1101/2021.08.24.21262415v1.full
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