How likely are vaccinated people to contract COVID?

The novel coronavirus has posed an unprecedented challenge to people's physical and mental health. Although COVID vaccines were developed in time and have proven effective, breakthrough infections have become a source of major concern.

How likely are vaccinated people to contract COVID?
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The novel coronavirus has posed an unprecedented challenge to people's physical and mental health. Although COVID vaccines were developed in time and have proven effective, breakthrough infections have become a source of major concern.