不同经历，不同态度

A new University of Michigan poll shows that 61% of people over 50 who have already gotten at least one dose of COVID-19 vaccine are very likely to roll up their sleeves this fall to get an updated booster shot. 

https://ihpi.umich.edu/news/most-older-adults-ready-roll-sleeves-fall-updated-covid-19-boosters-u-m-poll-shows#:~:text=Two%20thirds%20(66%25)%20of,had%20had%20COVID%2D19%20once.