15 Foods That Boost the Immune System: Citrus, Bell Peppers & More

The immune system: Cells, tissues, function, and disease immune system The immune system protects your child's body from outside invaders These include germs such as bacteria, viruses, and fungi, and toxins (chemicals made by lymphatic system Your immune system is made up of cells, tissues, and organs that fight infections and diseases Learn how it works, and about diseases of

immune system The immune system protects organisms from infection with layered defenses of increasing specificity Physical barriers prevent pathogens, such