Immune Regulation Ltd., a U.S.-U.K. venture advancing peptide-based therapies for rheumatoid arthritis and allergic diseases, has closed a £40.6 million (US$53.4 million) series B financing that will support its preparation for multiple phase II studies next year, as well as an evaluation of one candidate in COVID-19-related acute respiratory distress syndrome. Morningside Ventures led the round, along with existing shareholders, including London-based 24Haymarket.