How threatful are these graphic warnings?

Source : Perceived effectiveness of pictorial health warnings among Mexican youth and adults:
a population-level intervention with potential to reduce tobacco-related inequities

The role of graphic warning labels on motivation to quit among low SES smokers might be particularly important

Source : Communicating Health Information to Disadvantaged Populations

Labels depicting negative health effects to smokers were identified as most motivational

Source : The role of theory-driven graphic warning labels in motivation to quit:
a qualitative study on perceptions from low-income, urban smokers

Real-world study shows disturbing images get smokers to think about risks

Source : How graphic photos on cigarette packs help smokers consider quitting

Our brains take action to these images

Source : Graphic Warning Labels Elicit Affective and Thoughtful Responses from Smokers:
Results of a Randomized Clinical Trial

Discourage young people from smoking

Source : Plain tobacco packaging- Wikipedia

Source : Warning images on cigarette packets 'raise young adults' knowledge about harms of smoking'

A picture says a thousand words

Source : Cigarette Package Health Warnings International Status Report