Dreams about illness, death, and forced medical interventions can often reflect feelings of anxiety, fear of loss, or a sense of powerlessness in waking life. In your dream, the scenario of people getting sick and dying might symbolize concerns about health—either your own or that of loved ones. The military enforcing vaccinations could represent a feeling of lack of control or being subjected to external pressures and authority.

The dynamic of one person dying quickly, one dying slowly, and one surviving might represent the different ways you perceive challenges or crises in your life. It could also indicate feelings of guilt or helplessness regarding those around you, as well as the stress of having to constantly confront these fears (having to return for another shot).

Consider what aspects of your life may be causing you stress or fear—whether it's health concerns, societal pressures, or personal relationships. Reflecting on these feelings can help you understand the underlying emotions that your dream is expressing, and may guide you in addressing any anxieties you have in your waking life. Finding healthy ways to cope with these feelings, such as talking to someone you trust or practicing stress-relief techniques, could be beneficial.