Ooooowie! It does happen so fast that it doesn't hurt going in, it's the taking it out that smarts!!!! I saw a story on the news this week about a beautiful baby girl that just died from whopping cough. They say for adults you should get your shots updated every 10 years. I know it's been more than that for me so I am going to update. Babies can't get their shot until 2months so they are vulnerable if they are exposed.