Of 288,072 people aged 16-39, only 6 people who had only 2 doses were hospitalized, compared to 1 person who had 3 doses [1]. This study was published before Omicron in October, for which the vaccine is even less effective and the disease is less severe.

I'm not yet aware of any other study that indicates the booster is useful for people in this age group.

I thought that a spike in antibodies might be useful in the short term, but a recent CDC presentation [2] said of an Omicron case study:

> 79% fully vaccinated; 32% with booster dose; Five of the 14 persons received additional dose <14 days before symptom onset

which doesn't give me any confidence.

> security theatre

Since mandates don't exclude people that were previously infected, to me, they seem punitive.

[1] https://www.thelancet.com/journals/lancet/article/PIIS0140-6...

[2] https://www.cdc.gov/vaccines/acip/meetings/downloads/slides-...