UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the year ended December 31, 2021 ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission File Number 001-39603 REVELATION BIOSCIENCES, INC. (Exact name of registrant as specified in its charter) | Delaware | 84-3898466 | | --- | --- | | (State or Other Jurisd ...