Step-by-step explanation:
1. Graphic images: A strong visual element might be graphic images of individuals suffering from the flu, including those displaying severe symptoms, being hospitalized, or experiencing complications.
2. Maps and graphs: Maps showing the geographical spread of the flu, graphs demonstrating rapid increases in the number of cases, or data on mortality rates could all serve to highlight the seriousness of the situation.
3. Color schemes: The use of darker, more somber color tones or alarming reds might heighten the sense of concern surrounding the flu.
4. Historical footage: Highlighting past flu pandemics or outbreaks, such as the 1918 Spanish Flu, could emphasize the potential dangers associated with the flu.
5. Doctor or expert interviews: Footage of doctors, scientists, or other experts discussing the severity and potential consequences of the flu would lend credibility to the notion that it's a worrisome subject.