Immunology Essentials

Clues in this puzzle

Across

• The state of not feeling well due to infection (4)
• A dull or steady pain caused by illness (4)
• The bodys first line of defense against invaders (4)
• An injection used to deliver a vaccine (4)

Down

• A treatment that ends a disease or condition (4)
• To become healthy again after an injury (4)
• An organism that a parasite lives inside of (4)
• Organ protected by immune cells in the chest (4)

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