2022
The year began with another wave in the COVID-19 pandemic, with SARS-CoV-2 Omicron variant, Omicron spreading rapidly and becoming the dominant variant of the SARS-CoV-2 virus worldwide. Tracking a decrease in cases and deaths, 2022 saw the removal of most COVID-19 restrictions and the reopening of international borders in the vast majority of countries, while the global rollout of COVID-19 vaccines continued. The global economic recovery from the pandemic continued, though many countries experienced an ongoing 2021–2023 inflation surge, inflation surge; in response, many central banks raised their interest rates to landmark levels. The world population reached eight billion people in 2022. The year also witnessed numerous natural disasters, including two devastating Atlantic hurricanes (Hurricane Fiona, Fiona and Hurricane Ian, Ian), and 2021–22 Hunga Tonga–Hunga Haʻapai eruption and tsunami, the most powerful volcano eruption of the century so far. The later part ...
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COVID-19 Vaccine
A COVID19 vaccine is a vaccine intended to provide acquired immunity against severe acute respiratory syndrome coronavirus 2 (SARS‑CoV‑2), the virus that causes coronavirus disease 2019 ( COVID19). Prior to the COVID19 pandemic, an established body of knowledge existed about the structure and function of coronaviruses causing diseases like severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS). This knowledge accelerated the development of various vaccine platforms during early 2020. The initial focus of SARS-CoV-2 vaccines was on preventing symptomatic, often severe illness. In January 2020, the SARS-CoV-2 genetic sequence data was shared through GISAID, and by March 2020, the global pharmaceutical industry announced a major commitment to address COVID19. In 2020, the first COVID19 vaccines were developed and made available to the public through emergency authorizations and conditional approvals. Initially, most COVID19 vaccines were two ...
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