Pfizer, BioNTech start late stage clinical trial of Covid vaccine

New York: US-based Pfizer and German biotech firm BioNTech have announced the start of a late stage clinical trial of a Covid-19 vaccine jointly developed by the two companies. The Phase 2/3 study will involve up to 30,000 participants between 18 and 85 years of age, the two companies said on Monday. The vaccine candidate, BNT162b2, […]