흡연자, 비흡연자보다 독감 백신 효과 2~3배↑…감염 확률 ‘뚝’ / KBS 2024.10.25. KBSNews 0 16 10.25 08:04 https://www.youtube.com/watch?v=OST5QJHxxos + 3 https://www.youtube.com/feeds/videos.xml?channel_id=UCcQTRi69dsVYHN3ex… + 2 흡연자, 비흡연자보다 독감 백신 효과 2~3배↑…감염 확률 ‘뚝’ / KBS 2024.10.25.