Makers of the leading COVID-19 vaccines have launched trials of a two-in-one shot that would attack the coronavirus and influenza, hoping a single shot will be more convenient than a poke in both ...

Update Dec. 16, 2022: Updates headline to clarify that Albert Bourla is not resigning and did not say mRNA COVID-19 vaccines don't work. Edits paragraph three to include Pfizer comment about ...

But this laboratory-based work is still far from the clinic, whereas Pfizer could launch its vaccine as early as 2025.