Nation Pfizer and BioNTech announce plans to test omicron-specific COVID-19 vaccine in adult trials January 25, 2022 Karen Weintraub, USA TODAY Comments Off on Pfizer and BioNTech announce plans to test omicron-specific COVID-19 vaccine in adult trials Pfizer and BioNTech will conduct three simultaneous trials in adults to determine if an omicron-specific vaccine is more effective than current shots.