TUESDAY, Oct. 17, 2023 (HealthDay News) -- Two doses of a novel intranasal live-attenuated COVID-19 vaccine, CoviLiv, induce poly-antigenic immune response, according to a study presented at the annual meeting of the Infectious Diseases Society of America (IDWeek), held from Oct. 11 to 15 in Boston. Johanna Kaufmann, Ph.D., from Codagenix in Cambridge, Massachusetts, and