As of mid-December 2020, the COVID-19 vaccine from the Biontech/Pfizer cooperation showed significant lower rates of severe adverse events than Moderna's product, with the exception of chills where Moderna showed a lower rate. During November, both sites reported nearly the exact same efficacy of around 95 percent of their vaccines.
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Evaluate Vantage. (December 15, 2020). Severe adverse events in COVID-19 vaccines developed by BioNTech/Pfizer and Moderna as of December 2020* [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 27, 2026, from /statistics/1193695/covid-vaccine-moderna-vs-biontech-severe-adverse-events/
Evaluate Vantage. "Severe adverse events in COVID-19 vaccines developed by BioNTech/Pfizer and Moderna as of December 2020*." Chart. December 15, 2020. ÌÇÐÄÆƽâ°æ. Accessed July 27, 2026. /statistics/1193695/covid-vaccine-moderna-vs-biontech-severe-adverse-events/
Evaluate Vantage. (2020). Severe adverse events in COVID-19 vaccines developed by BioNTech/Pfizer and Moderna as of December 2020*. ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 27, 2026. /statistics/1193695/covid-vaccine-moderna-vs-biontech-severe-adverse-events/
Evaluate Vantage. "Severe Adverse Events in Covid-19 Vaccines Developed by Biontech/Pfizer and Moderna as of December 2020*." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 15 Dec 2020, /statistics/1193695/covid-vaccine-moderna-vs-biontech-severe-adverse-events/
Evaluate Vantage, Severe adverse events in COVID-19 vaccines developed by BioNTech/Pfizer and Moderna as of December 2020* ÌÇÐÄÆƽâ°æ, /statistics/1193695/covid-vaccine-moderna-vs-biontech-severe-adverse-events/ (last visited July 27, 2026)
Severe adverse events in COVID-19 vaccines developed by BioNTech/Pfizer and Moderna as of December 2020* [Graph], Evaluate Vantage, December 15, 2020. [Online]. Available: /statistics/1193695/covid-vaccine-moderna-vs-biontech-severe-adverse-events/
