My DS is scheduled to have his varicella vaccine on his first birthday exactly (we live abroad). It's just occurred to me though that we have lots of celebratory plans in the following couple of days. Are there any particular side effects? He's been fine with all others, the odd fever or pain but nothing calpol couldn't sort. Suddenly wondering if I should postpone (getting an appointment is a pain generally which is why I'm weighing my options).