1. Menni C, Klaser K, May A, Polidori L, Capdevila J, Louca P, Sudre CH, Nguyen LH, Drew DA, Merino J, Hu C. Vaccine side-effects and SARS-CoV-2 infection after vaccination in users of the COVID Symptom Study appin the UK: a prospective observational study. Lancet Infect Dis. 2021. https://doi.org/10.2139/ssrn.3830769.
2. Ivory D, Smith M, Lee J.C., Walker A.S., Gamio L, Holder J, Lu D, Watkins D, Hassan A, Allen J, Lemonides A, Bao B, Brown E, Burr A, Cahalan S, Craig M, De Jesus Y, Dupre B, Guggenheim B, Harvey B, Higgins L, Lim A, Matthews A.L., Moffat-Mowatt J, Pope L, Queen C.S., Rodriguez N, Ruderman J, Saldanha A, Thorp B, White K, Wong BG, Yoon J. See how vaccinations are going in your county and state. New York Times [Internet]. 2022 February 25 [cited 2022 February 25]; Interactive. https://www.nytimes.com/interactive/2020/us/covid-19-vaccine-doses.html
3. Mendez R. Most U.S. companies will require proof of Covid vaccination from employees, survey finds [Internet]. CNBC; 2021 April 29 [cited 2021 May 26]. https://www.cnbc.com/2021/04/29/most-us-companies-will-require-proof-of-covid-vaccination-from-employees-survey.html?campaign_id=154&emc=edit_cb_20210430&instance_id=30075&nl=coronavirus-briefing®i_id=81555328&segment_id=56986&te=1&user_id=f3f79d5d0bbf165ef86ec157fb530842
4. CDC (Centers for Disease Control and Prevention). Essential Workers COVID-19 Vaccine Toolkit [Internet]. CDC; 2021 May 20 [cited 2021 May 26]. https://www.cdc.gov/coronavirus/2019-ncov/vaccines/toolkits/essential-workers.html
5. CDC (Centers for Disease Control and Prevention). Workplace Vaccination Program [Internet]. CDC; 2021 Nov. 4 [cited 2022 Feb. 25]. https://www.cdc.gov/coronavirus/2019-ncov/vaccines/recommendations/essentialworker/workplace-vaccination-program.html