As of September 2022, 16 protein subunit vaccines for COVID-19 in the pharmaceutical R&D pipeline worldwide were in phase III of development. This graph illustrates the distribution of COVID-19 vaccines in the R&D pipeline worldwide, by mechanism of action and phase.
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PMPRB. (June 1, 2023). Distribution of COVID-19 vaccines in the R&D pipeline worldwide as of 2022, by mechanism of action and phase [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 30, 2026, from /statistics/1336206/covid-vaccines-by-mechanism-and-phase-worldwide/
PMPRB. "Distribution of COVID-19 vaccines in the R&D pipeline worldwide as of 2022, by mechanism of action and phase." Chart. June 1, 2023. ÌÇÐÄÆƽâ°æ. Accessed July 30, 2026. /statistics/1336206/covid-vaccines-by-mechanism-and-phase-worldwide/
PMPRB. (2023). Distribution of COVID-19 vaccines in the R&D pipeline worldwide as of 2022, by mechanism of action and phase. ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 30, 2026. /statistics/1336206/covid-vaccines-by-mechanism-and-phase-worldwide/
PMPRB. "Distribution of Covid-19 Vaccines in The R&d Pipeline Worldwide as of 2022, by Mechanism of Action and Phase." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 1 Jun 2023, /statistics/1336206/covid-vaccines-by-mechanism-and-phase-worldwide/
PMPRB, Distribution of COVID-19 vaccines in the R&D pipeline worldwide as of 2022, by mechanism of action and phase ÌÇÐÄÆƽâ°æ, /statistics/1336206/covid-vaccines-by-mechanism-and-phase-worldwide/ (last visited July 30, 2026)
Distribution of COVID-19 vaccines in the R&D pipeline worldwide as of 2022, by mechanism of action and phase [Graph], PMPRB, June 1, 2023. [Online]. Available: /statistics/1336206/covid-vaccines-by-mechanism-and-phase-worldwide/
