1.3 SARS, MERS and COVID-19
The human coronavirus was first identified in 1962 in a child with cold symptoms and was called B814. Since then, six species of this type of virus have appeared in the world. The most severe diseases were caused by SARS in 2003, with 812 deaths, and MERS-CoV which between 2012 and 2017 resulted in the deaths of 712 people. SARS-CoV-2 is the seventh known coronavirus that is dangerous for humans. COVID-19 does not cause high mortality compared to acute respiratory failure MERS-CoV or SARS. However, it spreads rapidly and has already caused more deaths worldwide than SARS and MERS combined.
According to Worldometer Data (WMD) (https://www.worldometers.info/coronavirus/, data collected as of December 31, 2020), there were 83,135,180 global cases of COVID-19 infection by the end of 2020, of which 1,813,389 cases resulted in humans’ death, and 58,933,056 people recovered. The coronavirus COVID-19 is affecting 218 countries and territories around the world and two international conveyances. The fatality rate is still being assessed (WMD: December 31, 2020).
When it comes to the pandemic’s development over time, as of September 08, 2021, we are expecting the fourth wave, we are experiencing the third wave of an increased number of people infected. After originally erupting in China in November and December 2019, the first worldwide wave of the COVID-19 pandemic started at the end of March 2020 and peaked in April 2020. Governmental responses across countries differed greatly at that time, from severe lockdown introduced in Italy – the country most affected among those in Europe – to the United Kingdom and Sweden who were convinced that the economic and social costs of a lockdown would be too big and decided against introducing severe restrictions, at least at the beginning. The summer of 2020 brought hope, encouraging many governments to lower restrictions and people to protest against the restrictions as the numbers of new COVID-19 cases dropped in many countries. However, in October and November 2020 it became clear that the second wave of the pandemic was inevitable. This time, similar but often less severe restrictions were introduced around the world. Spirits were kept up by the news about vaccines against the deadly virus which were already invented and during the last phases of testing. After reaching peaks in the winter of 2020, the beginnings of 2021 saw a decline in the worldwide number of new COVID-19 cases. From late December 2020, the vaccination process started as well, letting some experts believe that the COVID-19 pandemic was a thing of 2020. However, as new virus mutations appeared in the United Kingdom and South Africa and the European Union governments avoided early implementation of a new lockdown, in March 2021 the third wave of the pandemic began, leaving experts to wonder about the future (Johns Hopkins University: March 25, 2021).
Geographically, the highest number of cases of infection and death have been reported in the United States (41,206,672 total cases and 669,022 total deaths), India (33,096,718 total cases and 441,443 total deaths), Brazil (20,913,578 total cases and 584,208 total deaths), Russia (7,065,904 total cases and 189,582 total deaths), the United Kingdom (7,056,106 total cases and 133,483 deaths), France (6,854,028 total cases and 115,159 total deaths), Turkey (6,542,654 total cases and 58,651 total deaths), Argentina (5,211,801 total cases and 112,851 total deaths), Iran (5,210,978 total cases and 112,430 total deaths), Colombia (4,921,410 total cases and 125,378 total deaths), Spain (4,892,640 total cases and 85,066 total deaths), Italy (4,579,502 total cases and 129,638 total deaths), Indonesia (4,147,365 total cases and 137,782 total deaths) and Germany (4,029,849 total cases and 92,949 total deaths), Mexico (3,449,295 total cases and 264,541 total deaths), Poland (2,891,602 total cases and 75,403 total deaths), (September 08, 2021).
Moreover, it should be noted that many cases and deaths have not been statistically recorded as they have been asymptomatic, and not every country has provided reliable data on cases and deaths.