DUNCAN MIRIRI and GEORGE OBULUTSA GLOBAL pharmaceutical firms should license the production of COVID-19 vaccines in Africa rather than just do piecemeal contract deals, an African Union special envoy has said. AU coronavirus envoy Strive Masiyiwa was speaking a day after Pfizer and BioNTech announced a "fill and finish" deal with South Africa's Biovac Institute under which it will carry out the final stages of vaccine manufacturing where the product is processed and put into vials. Pfizer and BioNTech will handle drug substance production at their facilities in Europe. Medecins Sans Frontieres (MSF) has called the arrangement "restrictive" and said…