Variant of Concern

A Variant of Concern (VOC) is a version of a virus, like COVID-19, that has changes in its genetic makeup which may affect how it spreads, causes illness, or responds to immunity from past infection or vaccines. These variants are closely monitored by health authorities because they can impact public health strategies, treatments, and vaccine effectiveness. Recognizing a variant as a VOC helps scientists and health officials prioritize research, adjust policies, and communicate risks to the public to better control and prevent its spread.