Everest Medicines and Providence Therapeutics announces that PTX-COVID19-B, a mRNA Vaccine for COVID-19, has received approval for inclusion in WHO Solidarity Trial Vaccines (STV) Program PR Newswire SHANGHAI, Dec. 20, 2021 SHANGHAI , Dec. 20, 2021 /PRNewswire/ -- Everest Medicines (HKEX 1952.HK) and Providence Therapeutics (" Providence ") announced today that their COVID-19 vaccine, PTX-COVID19-B, has been recommended by an independent advisory group to be part of the WHO Solidarity Trial...