https://www.healthline.com/health/hiv-aids/facts-statistics-infographic
as i mentioned before, the numbers and facts about certain illnesses for example the one mentioned in this article (HIV), helps other understand how dangerous, how severe such matter is, and how much care and cation people should take into consideration.
personally i get convinced easily when there's quantitative Data and not just qualitative. because numbers and percentages help you reach an understanding and help you visualize the matter even more. what would help as well, is using images of actual cases. it may be too much for the eye to bare in the case of (HIV), how ever it is proof that this thing is serious and we should be way more careful about our health.