The rollout of booster doses of COVID-19 vaccines to the general population is controversial. The ratio of vaccine risk to benefits likely has swung more towards risk than during the original randomized trials, due to dose-dependent adverse events and to fixation of immune responses on a variant no longer circulating, yet the evidence underpinning mass use of boosters is weaker than was the evidence for the original vaccine rollout. In light of an unsatisfactory risk-evidence situation, aggregate weekly data on excess mortality in New Zealand are used here to study the impacts of rolling out booster doses.

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https://econpapers.repec.org/paper/waieconwp/22