Vax 2.0, Here We Go: Moderna Announces “Human Trials” of New Hybrid Flu-Covid Vaccine Are Officially Underway – Future “Triple-Threat” Vaccine “in the Works” Tuesday, June 21, 2022 By Stillness in the Storm Leave a Comment (Julian Conradson) On Sunday, Moderna’s Chief Medical Officer Dr. Paul Burton announced the vaccine maker had officially kicked off phase 1 “human trials” for its new two-in-one Flu-Covid jab.