The Effect of Vaccination Rates on the Infection of COVID-19 under the Vaccination Rate below the Herd Immunity Threshold.
Int J Environ Res Public Health
; 18(14)2021 07 14.
Article
in English
| MEDLINE | ID: covidwho-1314639
ABSTRACT
Although vaccination is carried out worldwide, the vaccination rate varies greatly. As of 24 May 2021, in some countries, the proportion of the population fully vaccinated against COVID-19 has exceeded 50%, but in many countries, this proportion is still very low, less than 1%. This article aims to explore the impact of vaccination on the spread of the COVID-19 pandemic. As the herd immunity of almost all countries in the world has not been reached, several countries were selected as sample cases by employing the following criteria more than 60 vaccine doses per 100 people and a population of more than one million people. In the end, a total of eight countries/regions were selected, including Israel, the UAE, Chile, the United Kingdom, the United States, Hungary, and Qatar. The results find that vaccination has a major impact on reducing infection rates in all countries. However, the infection rate after vaccination showed two trends. One is an inverted U-shaped trend, and the other is an L-shaped trend. For those countries with an inverted U-shaped trend, the infection rate begins to decline when the vaccination rate reaches 1.46-50.91 doses per 100 people.
Keywords
Full text:
Available
Collection:
International databases
Database:
MEDLINE
Main subject:
Immunity, Herd
/
COVID-19
Type of study:
Experimental Studies
/
Observational study
Topics:
Vaccines
Limits:
Humans
Country/Region as subject:
South America
/
Asia
/
Chile
/
Europa
Language:
English
Year:
2021
Document Type:
Article
Affiliation country:
Ijerph18147491
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