On Mar. 15, 2021, ImmunityBio announced it had met the safety requirements for the first 12 participants in its Phase Ib human adenovirus (hAd5)-based T-cell COVID-19 vaccine trials in sublingual and oral formulations. The independent Safety Review Committee recommended the study continue with no modifications to the trial design. The trials, which will involve 80 participants, were expected to be fully enrolled in Q2.