Even before the federal government’s recent decision last week to authorize COVID-19 boosters all adults, it had already recommended them in October for people with certain high-risk conditions. Along with with illnesses like diabetes and heart disease, that list included mental health conditions.

The decision to prioritize people with psychiatric diagnoses in the early rollout of boosters came after a growing number of studies linked mental health disorders with higher risk of both COVID-19 infection and of serious outcomes.

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