Hellow guys, Welcome to my website, and you are watching Chapter 4, Part A: Common Reactions and Potential Serious Adverse Events After Smallpox Vaccination. and this vIdeo is uploaded by Centers for Disease Control and Prevention (CDC) at 2018-03-14T10:26:02-07:00. We are pramote this video only for entertainment and educational perpose only. So, I hop you like our website.