I Received A Chicken Pox Vaccine When I Was 4,

I received a chicken pox vaccine when I was 4, but I didn't get the booster. Recently I got another chicken pox vaccine since I didn't get the booster when I was little. Will I need to still get another shot (I read you need two shots for it to be more effective) since the last time I had a chicken pox vaccine was so long ago?