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EDITORIAL
Year : 2022  |  Volume : 15  |  Issue : 3  |  Page : 293-298  

Covid-19 mass vaccination – How much impact at population level?


Department of Community Medicine, Dr DY Patil Medical College, Hospital and Research Centre, Dr DY Patil Vidyapeeth, Pune, Maharashtra, India

Date of Submission10-Mar-2022
Date of Decision15-Mar-2022
Date of Acceptance20-Mar-2022
Date of Web Publication01-Apr-2022

Correspondence Address:
Amitav Banerjee
Department of Community Medicine, Dr DY Patil Medical College, Hospital and Research Centre, Dr DY Patil Vidyapeeth, Pune, Maharashtra
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/mjdrdypu.mjdrdypu_198_22

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How to cite this article:
Banerjee A. Covid-19 mass vaccination – How much impact at population level?. Med J DY Patil Vidyapeeth 2022;15:293-8

How to cite this URL:
Banerjee A. Covid-19 mass vaccination – How much impact at population level?. Med J DY Patil Vidyapeeth [serial online] 2022 [cited 2022 May 19];15:293-8. Available from: https://www.mjdrdypv.org/text.asp?2022/15/3/293/342521



During 2020, the world waited patiently enduring restrictive measures with bated breaths behind masks covering their face and nose with an optimism that the vaccine against the pandemic of Covid-19 was round the corner. The hope was that “acche din” (good days) will be back soon after the rollout of the vaccines.

The vaccines, developed at warp speed were granted emergency use authorization by end of 2020. Most countries started rolling out mass vaccination in the first half of 2021, an unprecedented phenomenon in public health history. Never before, the country's population had been administered vaccines during an active pandemic on such a large scale.

After almost a year of mass vaccination against Covid-19, what impact has it made on trends at the population level?

The patterns of trends and deaths from Covid-19 before and after vaccine roll out in a few countries, compiled from data available in the public domain,[1],[2] are illustrated in [Figure 1],[Figure 2],[Figure 3],[Figure 4],[Figure 5],[Figure 6],[Figure 7],[Figure 8],[Figure 9],[Figure 10],[Figure 11],[Figure 12],[Figure 13],[Figure 14],[Figure 15],[Figure 16]. The emerging picture is not very encouraging. Readers can draw their own inferences keeping in mind the inherent ecological fallacies in data at the population level.
Figure 1: Trends of Covid-19 cases in Japan

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Figure 2: Trends of Covid-19 deaths in Japan

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Figure 3: Trends of Covid-19 cases in Singapore

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Figure 4: Trends of Covid-19 deaths in Singapore

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Figure 5: Trends of Covid-19 cases in USA

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Figure 6: Trends of Covid-19 deaths in USA

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Figure 7: Trends of Covid-19 cases UK

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Figure 8: Trends of Covid-19 deaths in UK

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Figure 9: Trends of Covid-19 cases in Israel

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Figure 10: Trends of Covid-19 deaths in Israel.

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Figure 11: Trends of Covid-19 cases in Malaysia

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Figure 12: Trends of Covid-19 deaths in Malaysia

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Figure 13: Trends of Covid-19 cases in Sri Lanka

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Figure 14: Trends of Covid-19 deaths in Sri Lanka

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Figure 15: Trends of Covid-19 cases in Indonesia

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Figure 16: Trends of Covid-19 deaths in Indonesia

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Halfway into the year 2021, there was a sobering realization that the impact of the mass vaccination at the population level was modest if any. The Centre for Disease Control, Atlanta, reported an increase of 0.01% to 9% in hospitalization and from 0 to 15.1% in deaths between January and May 2021 among the fully vaccinated. A study found that the incidence of Covid-19 was unrelated to levels of vaccination across 68 countries and 2947 counties in the United States.[3] Given the uncertainties, authors of this study advised humility and respect while encouraging people to get vaccinated without shaming or stigmatizing those who refused.



 
  References Top

1.
https://www.worldometers.info/coronavirus/#countries. [Last accessed on 2022 Mar 10].  Back to cited text no. 1
    
2.
https://ourworldindata.org/covid-vaccinations. [Last accessed on 2022 Mar 10].  Back to cited text no. 2
    
3.
Subramanian SV, Kumar A. Increases in COVID-19 are unrelated to levels of vaccination across 68 countries and 2947 counties in the United States. Eur J Epidemiol 2021;36:12:1237-40.  Back to cited text no. 3
    


    Figures

  [Figure 1], [Figure 2], [Figure 3], [Figure 4], [Figure 5], [Figure 6], [Figure 7], [Figure 8], [Figure 9], [Figure 10], [Figure 11], [Figure 12], [Figure 13], [Figure 14], [Figure 15], [Figure 16]



 

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