More research will be needed to confirm whether this method should become widely recommended for future vaccines, however.
Several studies have looked at the question of whether arm choice can affect the immune response to multi-dose vaccines.
The new study was led by researchers from Oregon Health & Science University.
A dose of a Moderna covid-19 vaccine being prepared.Photo: Sholten Singer (AP)
To this day, the circulating strains of SARS-CoV-2 still belong to the Omicron lineage.
Given enough evidence, it might eventually prompt a sweeping change in how we vaccinate people in general.
[But] all things being equal, we ought to consider switching up the arms.
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