Boston – September 22, 2026 -- Viva-Thera has nominated a preclinical candidate targeting the membrane-proximal external region (MPER) of HIV-1 gp41, completing discovery and optimization in seven months through a partnership with AI drug-design firm XtalPi (HKEX: 2228). The biotech, incubated and backed by XtalPi as a strategic shareholder, made its public debut disclosing progress across four HIV modalities: vaccines, long-acting small molecules, gene therapy and cell therapy.