The National Vaccine Advisory Committee (NVAC) is a federal advisory committee that provides recommendations to the U.S. Department of Health and Human Services (HHS) regarding vaccines and immunization policies in the United States. The committee includes representatives from various sectors, including public health, healthcare providers, researchers, and community advocates. As of my knowledge cutoff in September 2021, I don't have specific information about the National Vaccine Advisory Committee meetings or activities in 2023. To obtain the most accurate and up-to-date details about the committee's meetings, schedules, and recommendations in 2023, I recommend visiting the official website of the National Vaccine Advisory Committee or checking the HHS website for updates. These sources should provide you with the latest information regarding the committee's activities and meetings in 2023.