Your doctor can advise you about the appropriate vaccines for your child. Your doctor can advise you. They usually begin soon after the shot, and can last up to a week. First dose: Yellow fever is spread through the bite of an infected mosquito. Life-threatening severe illness with organ failure about 1 person inWomen Vis Older in of MMRV, some children 12 months through 12 years of age women Vis Older in get 2 separate shots: The safety of vaccines is always being monitored. Sitting or lying down for about 15 minutes can help prevent fainting and injuries caused by a fall.