 An extra bird means extra chicks, or extra meat, or extra eggs. Just one extra egg a week provides around 8g of protein, 6g of fat, and a bunch of useful micronutrients, which can make a lasting difference to a child's growth. And best of all, the researchers proved this. They found boys and girls from households that received the vaccine both ate 24% more high protein food. This led to them growing taller and gaining more weight. So one chicken can make a huge difference. It's a clear example of how protecting animal health also benefits human health. An intervention like subsidizing a chicken vaccine might seem simple, but consider this. 7.8 million people live in rural Kenyan communities like these. That's a lot of people who could benefit.