https://www.biopharmadive.com/news/moderna-flu-covid-vaccine-fda-delay/746857/
Moderna combination flu, COVID shot delayed amid FDA scrutiny | BioPharma Dive
Additional data required by the FDA are the latest evidence of what one analyst described as a “higher bar” for vaccines.
combination flu covidmoderna
https://www.biopharmadive.com/news/pfizer-biontech-combination-flu-covid-vaccine-study-results/724492/
Pfizer, BioNTech stumble in effort to develop combination flu, COVID shot | BioPharma Dive
The vaccine didn’t spur a strong enough immune response against a particular flu strain in a Phase 3 trial, leading the companies to ponder adjustments.
combination flu covidpfizer