Shingrix is a new vaccine approved to prevent shingles. What’s shingles? Should you get this vaccine? What if you already had a vaccine for shingles? Good questions. Read on. To understand shingles, we have to understand chicken pox. Chicken pox was an extremely common childhood illness before 1995, when routine vaccination for chicken pox began. Before that, an average of 4 million people got chicken pox each year in the U.S. and about 100 people died. Chicken pox is caused by the varice...