Theories exist to direct understanding of how phenomena work in real-life situations. Mass communication theories have continued to emerge at explaining the influence mass media contents exert on human behaviour. The Bullet theory qualifies as the oldest theory and postulates inter alia that mass media contents exert direct influence on media audience; hence they swallow mass media contents hook, line and sinker. However, several pre and post Internet theories have emerged to punctuate the substance of the Bullet theory. No doubt COVID 19 mass media contents were disseminated to influence the attitudes of the audience. The credibility of information source, message contents, opinion leadership, as well as the substance of social relationship and cognitive theory of multimedia learning qualify as relevant variables to underscore the relevance, or otherwise of the Bullet theory in the face of such post Internet theories as social exchange and cognitive theories among others. The situation prompted this empirical study. Simple random sampling technique was used to select a representative sample from the population hence a total of 340 was selected from a target population of 1360. A structured questionnaire was the instrument for the collection of data just as responses were represented in Likert form. The study found out that respondents were directly influenced by mass media contents in the early stages of the COVID 19 outbreak, but as more information emerged from different social media platforms critical views began to hold sway hence a change in behaviour. Most people became cynical of the messages as opinions continued to thunder various social media platforms with their user-generated contents characteristics. The study concluded that the Bullet theory still relevance to a minimal degree as its potent is seemingly caricatured by the realities of citizen journalism and user-generated contents. The study, therefore, recommended that studies should be intermittently carried out to examine the relevance of pre Internet theories or otherwise in the digital age.