Ways society can be affected by stds or stis are sexual contact, and the mixing of bodily fluids such as blood, spit (in some stds or stis), sweat (only in some stds or stis), urine, etc.
The answer would be abstinence because you’re abstaining from doing.... it
Vitamin A comes from leafy green vegetables, orange and yellow vegetables, tomato products, fruits, and some vegetable oils. It keeps eyes and skin healthy and helps protect against infections.