Top medical breakthroughs of 2023

From the first-ever RSV vaccines to the first drug approved to treat Alzheimer's disease, here are seven of the biggest medical breakthroughs in 2023. WATCH the ABC News Livestream: https://bit.ly/3rzBHum SUBSCRIBE to ABC News: https://bit.ly/2vZb6yP WATCH MORE on http://abcnews.go.com/ LIKE ABC News on FACEBOOK: https://www.facebook.com/abcnews FOLLOW ABC News on TWITTER: https://twitter.com/abc #birthcontrol #rsv #vaccine #2023 #breakthrough