Is a vaccinated person wrong to believe an unvaccinated person can be a threat to their health?

An anti-vaccine social media post recycles a common misperception: that vaccines are fake unless they completely protect every vaccinated person. The post implies that if vaccines were completely successful, a vaccinated person would have nothing to fear from someone who is unvaccinated.

But no vaccine is 100% effective, so the vaccinated person is still at risk of infection from someone carrying the virus.

Vaccine makers, the Centers for Disease Control, the Food and Drug Administration and medical professionals are unanimous in saying that vaccines are not 100% effective and that even vaccinated people should take precautions to avoid exposure to COVID-19 since "breakthrough" infections in vaccinated people have been recorded.

The CDC says: "COVID-19 vaccines are effective and are a critical tool to bring the pandemic under control ... There will be a small percentage of fully vaccinated people who still get sick, are hospitalized or die from COVID-19."