Enquanto Pfizer e BioNTech iniciam um estudo clínico de vacina baseada na variante Ômicron, não se tem clareza quanto ao tempo para autorização.

As Pfizer and BioNTech begin clinical trial of Omicron-based vaccine, timeline to authorization is unclear – STAT

Ver também:

Pfizer begins testing omicron-matched COVID shots in adults – Associated Press

Pfizer and BioNTech start trials of new Omicron-specific jab – BBC

Pfizer and BioNTech begin testing an omicron-specific COVID-19 vaccine – NPR