Table 1 Number of coronavirus disease 2019 (COVID-19) cases, deaths and vaccines administered during four semesters of the COVID-19 pandemic, from 1 January 2020 to 31 December 2021, denoted as pandemic periods 1–4, respectively.

From: Impact of the COVID-19 pandemic on the spontaneous reporting and signal detection of adverse drug events

Period

Dates

Number of cases

Number of deaths

Number of vaccines administered

Pre-pandemic 1 (1st semester 2019)

1/Jan/2019–30/Jun/2019

0

0

0

Pre-pandemic 2 (2nd semester 2019)

1/Jul/2019–31/Dec/2019

0

0

0

Pandemic 1 (1st semester 2020)

1/Jan/2020–30/Jun/2020

1,0474,820

552,096

0

Pandemic 2 (2nd semester 2020)

1/Jul/2020–31/Dec/2020

73,300,794

1,349,619

11,906,791

Pandemic 3 (1st semester 2021)

1/Jan/2021–30/Jun/2021

98,932,775

2,074,986

3,102,904,910

Pandemic 4 (2nd semester 2021)

1/Jul/2021–31/Dec/2021

105,992,117

1,492,411

6,063,042,563

  1. For the sake of completeness, the two semesters prior to the COVID-19 pandemic are also included, from 1 January 2019 to 31 December 2019, denoted as pre-pandemic periods 1 and 2.
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