A new study suggests that the Pfizer and Moderna vaccines might offer a long-lasting immunity to COVID-19.
The study suggests the mRNA vaccines "set off a persistent immune reaction" in the body - which could provide years of protection against the coronavirus, without boosters.
However, the continuing evolution of new coronavirus variants could change that.
The Johnson & Johnson vaccine was not included in the study.
Will coronavirus 'booster shots' become a regular thing like flu shots? Did you choose a specific vaccine to get, or just find whatever appointment was available?