Pfizer says "no safety signal" in late-stage study of COVID-19 vaccine BNT162b2

Pfizer said that subjects in its Phase III study of BNT162b2, a candidate mRNA-based vaccine against SARS-CoV-2, have so far exhibited only mild-to-moderate side effects, with fatigue being the most common. The company, which is developing the vaccine as part of a collaboration with BioNTech, noted that over 12,000 participants have now received a second dose of BNT162b2. 'So far there has been no safety signal reported,' remarked Mikael Dolsten, Pfizer's chief scientific officer. The drugmaker noted that more than 29,000 people have been recruited into the study, which has a target enrolment of 44,000.