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The epidemiological relevance of the COVID-19-vaccinated population is increasing

  • December 2021
DOI:10.1016/j.lanepe.2021.100272
Authors:
Günter Kampf at University of Greifswald
Günter Kampf
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Letter
The epidemiological relevance of the COVID-19-vaccinated population is
increasing
G€
unter Kampf*
University Medicine Greifswald, Institute for Hygiene and Environmental Medicine, Greifswald, Germany
ARTICLE INFO
Article History:
Received 1 November 2021
Accepted 3 November 2021
High COVID-19 vaccination rates were expected to reduce trans-
mission of SARS-CoV-2 in populations by reducing the number of
possible sources for transmission and thereby to reduce the burden
of COVID-19 disease. Recent data, however, indicate that the epide-
miological relevance of COVID-19 vaccinated individuals is increas-
ing. In the UK it was described that secondary attack rates among
household contacts exposed to fully vaccinated index cases was simi-
lar to household contacts exposed to unvaccinated index cases (25%
for vaccinated vs 23% for unvaccinated). 12 of 31 infections in fully
vaccinated household contacts (39%) arose from fully vaccinated epi-
demiologically linked index cases. Peak viral load did not differ by
vaccination status or variant type [1]. In Germany, the rate of symp-
tomatic COVID-19 cases among the fully vaccinated (“breakthrough
infections”) is reported weekly since 21. July 2021 and was 16.9% at
that time among patients of 60 years and older [2]. This proportion is
increasing week by week and was 58.9% on 27. October 2021
(Figure 1) providing clear evidence of the increasing relevance of the
fully vaccinated as a possible source of transmission. A similar situa-
tion was described for the UK. Between week 39 and 42, a total of
100.160 COVID-19 cases were reported among citizens of 60 years or
older. 89.821 occurred among the fully vaccinated (89.7%), 3.395
among the unvaccinated (3.4%) [3]. One week before, the COVID-19
case rate per 100.000 was higher among the subgroup of the vacci-
nated compared to the subgroup of the unvaccinated in all age
Figure 1. Vaccination rates and proportions of fully vaccinated people among symptomatic COVID-19 cases (60 years) in Germany between 21. July and 27. October 2021 based
on the weekly reports from the Robert Koch-Institute [2].
* Correspondence to: Prof. Dr. G€
unter Kampf, University Medicine Greifswald, Insti-
tute for Hygiene and Environmental Medicine, Ferdinand-Sauerbruch-Strasse, 17475
Greifswald, Germany
E-mail address: guenter.kampf@uni-greifswald.de
https://doi.org/10.1016/j.lanepe.2021.100272
2666-7762/© 2021 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
The Lancet Regional Health - Europe 11 (2021) 100272
Contents lists available at ScienceDirect
The Lancet Regional Health - Europe
journal homepage: www.elsevier.com/lanepe
groups of 30 years or more. In Israel a nosocomial outbreak was
reported involving 16 healthcare workers, 23 exposed patients and
two family members. The source was a fully vaccinated COVID-19
patient. The vaccination rate was 96.2% among all exposed individu-
als (151 healthcare workers and 97 patients). Fourteen fully vacci-
nated patients became severely ill or died, the two unvaccinated
patients developed mild disease [4]. The US Centres for Disease Con-
trol and Prevention (CDC) identifies four of the top five counties with
the highest percentage of fully vaccinated population (99.984.3%)
as “high”transmission counties [5]. Many decisionmakers assume
that the vaccinated can be excluded as a source of transmission. It
appears to be grossly negligent to ignore the vaccinated population
as a possible and relevant source of transmission when deciding
about public health control measures.
Author Contribution statement
GK as the sole author of this Letter, contributed to all aspects of
the text.
Declaration of Competing Interests statement
The author has no competing interests to declare
References
[1] Singanayagam A, Hakki S, Dunning J, et al. Community transmission and viral load
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[2] Robert Koch-Institut. W€
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2G. Kampf / The Lancet Regional Health - Europe 11 (2021) 100272
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... The US Center for Disease Control and Prevention (CDC) announced four of the top five counties with the highest percentages of fully vaccinated populations (84.3-99.9%) as "high" transmission counties (Kampf, 2021a(Kampf, , 2021b. Moreover, a large study by Subramanian and Kumar showed that vaccination for COVID-19 cannot control its spread regardless of the level of vaccination coverage, with data from 68 countries and 2,947 counties in the United States (Subramanian & Kumar, 2021). ...
... There have also been reports of appalling events worldwide, including a student's suicide due to bullying about his vaccination status in the United States (Joshua Rhett Miller, 2022). Consequently, a published correspondence noted that "stigmatizing unvaccinated people is unjustified" according to the cumulative data of the pandemic (Günter Kampf, 2021aKampf, , 2021b, and from an ethical point of view, the justification and imposition of mandatory vaccinations requires robust scientific evidence that the policy will achieve the intended goal in addressing a health emergency of dramatic proportions (e.g., extreme death rate) (An Roinn Sláinte Department of Health, 2021). By definition, a government should be intolerant to situations that involve the creation of excluded, marginalized, or segregated citizens and constantly strive to address concomitant social inequalities and the related issues that arise (O'Donnell et al., 2021). ...
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AKTUALISIERTER STAND FÜR DEUTSCHLAND 22
  • Robert Koch-Institut
W€ ochentlicher Lagebericht des RKI zur Coronavirus-Krankheit-2019 (COVID-19). AKTUALISIERTER STAND F € UR DEUTSCHLAND 22
  • Jul 2021
  • Robert Koch-Institut
Robert Koch-Institut. W€ ochentlicher Lagebericht des RKI zur Coronavirus-Krankheit-2019 (COVID-19). AKTUALISIERTER STAND F € UR DEUTSCHLAND 22. Juli 2021.
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
  • Jan 2021
  • Singanayagam A.
  • Hakki S.
  • Dunning J.
  • Madon K.J.
  • Crone M.A.
  • Koycheva A.
  • Derqui-Fernandez N.
  • ATACCC Study Investigators