1. World Health Organization. Coronavirus disease (COVID-19) pandemic, https://www.who.int/emergencies/diseases/novel-coronavirus-2019; 2023 [accessed 02 December 2023].
2. Comparing COVID-19 vaccines for their characteristics, efficacy, and effectiveness against SARS-CoV-2 and variants of concern: a narrative review;Fiolet;Clin Microbiol Infect,2022
3. Our World in Data. Share of SARS-CoV-2 sequences that are the omicron variant, https://ourworldindata.org/grapher/covid-cases-omicron?time=2022-01-03; 2023 [accessed 02 December 2023].
4. Omicron SARS-CoV-2 variant: a new chapter in the COVID-19 pandemic;Karim;Lancet,2021
5. Centers for Disease Control and Prevention. COVID-19 Data Tracker, https://covid.cdc.gov/covid-data-tracker/#maps_deaths-total; 2022 [accessed 03 December 2023].