Because vaccines work
@infobeautiful And get vaccinated for whooping cough. It doesn't give you full protection, as this graph shows. I got it even though I got my shot, but I'm so happy I got the shot. It is an awful disease and I wish no one ever get it again. It was the worst and most protracted period of illness in my life. If I didn't have some immunity I might have been here anymore.

@infobeautiful

My theory is that those people vaccinate themselves and their children, they just don’t want YOU to do it.

@infobeautiful And yet there are people who are skeptical of vaccines, and won't get their children immunized.
Excelente forma de representar el uso de la vacunas
@infobeautiful It doesn't say what time period this is for.
@LillyHerself @infobeautiful they had different dates of introduction, so I suppose 'yearly' means 'the year before' vs 'the year after' (or current years?)