1. Forecasting using autocorrelated errors and multicollinear predictor variables
2. BioWorld. Available at: https://www.bioworld.com/articles/501906-chinas-cnbgsinopharm-covid-19-vaccine-is-79-effective?v=preview, 2020.
3. Centers for Disease Control and Prevention, Pfizer-BioNTech (COMIRNATY) COVID-19 Vaccine Questions. Available at: https://www.cdc.gov/vaccines/covid-19/info-by-product/pfizer/pfizer-bioNTech-faqs.html, 2021.
4. Centers for Disease Control and Prevention, Moderna COVID-19 Vaccine Questions. Available at: https://www.cdc.gov/vaccines/covid-19/info-by-product/moderna/moderna-faqs.html#vaccine-safety-efficacy, 2021.
5. Centers for Disease Control and Prevention, Janssen COVID-19 Vaccine (Johnson & Johnson). Available at: https://www.cdc.gov/vaccines/covid-19/info-by-product/janssen/index.html, 2021.