> it's not completely clear how long it lasts This explanation assumes we won't develop a better vaccine in a decade. Shingrix was expensive. I knew too many

> it's not completely clear how long it lasts This explanation assumes we won't develop a better vaccine in a decade. Shingrix was expensive. I knew too many people with horrific Shingles. A couple of days of very mild flu symptoms for me. Plan to avoid mental or physical responsibilities or events for 2 days after the shot.