Picture shows illustration for the coronavirus vaccine in Zagreb, Croatia, August 14, 2020. A Covid-19 vaccine being developed by Pfizer and Germanyâ  s BioNTech has been found to be more than 90 per cent effective Photo: Zeljko Lukunic/PIXSELL (Zagreb - 2020-08-14, Zeljko Lukunic/PIXSELL / IPA) p.s. la foto e' utilizzabile nel rispetto del contesto in cui e' stata scattata, e senza intento diffamatorio del decoro delle persone rappresentate