Figure 1: retrieved from CDC's COVID Data Tracker dashboard: https://covid.cdc.gov/covid-data-tracker/#variants-genomic-surveillance, displays the dominance of newer, emerging variants in the US population.

Figure 2: Data retrieved from https://github.com/owid/covid-19-data/, published in Nature Human Behavior available at: https://doi.org/10.1038/s41562-021-01122-8, displays the number of confirmed cases worldwide.

Figure 3: Also retrieved from https://github.com/owid/covid-19-data/, displays the vaccination rate per 100 on the basis of economy.

Figure 4: Retrieved directly from clinicaltrials.gov, displays the total number of completed and active clinical trials related to COVID-19 and SARS-CoV-2.