Fig. 6 | Signal Transduction and Targeted Therapy

Fig. 6

From: COVID-19 vaccine development: milestones, lessons and prospects

Fig. 6

A timeline of the preclinical and clinical trials of approved COVID-19 vaccines. Preclinical and clinical trials play important roles in evaluating the safety and protective efficacy of COVID-19 vaccines. The information of preclinical to clinical trials of several WHO-approved COVID-19 vaccines are provided in the form of a timeline, and partial Phase III clinical trials’ data were also displayed to show the total efficacy

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