Early Vaccine Authorization Raises Ethical and Logistical Challenges for Trial Sponsors

ABSTRACT

The much-anticipated meeting of FDA's Vaccines and Related Biological Products Advisory Committee (VRBPAC) last month addressed a number of critical issues related to testing and approval of vaccines to prevent COVID-19 infection, including policies and data requirements for determining that a pandemic vaccine can be considered safe and effective, particularly when based on more limited, early clinical trial data. While studies sponsored by AstraZeneca and Johnson & Johnson's Janssen unit resumed soon after the meeting, the study pauses were described by researchers as a sign that clinical trial safety systems were working as intended, as the analysts determined the adverse events were unrelated to the test vaccine candidates. The aim is to gain further information on vaccine efficacy and side effects, including rare adverse events and fuller comparisons among patient groups with differences in age, sex, comorbidities, and ethnic characteristics.