Skin Lesion - Any abnormal tissue on the skin caused by injury or disease.⏎
Universal Flu Vaccine - A vaccine that is effective against all forms of the influenza virus.⏎
Toxin - A poisonous substance, often a protein, produced by the metabolic processes of living cells or organisms that can cause disease if introduced into the body.⏎
Tissue Culture - The process by which tissues are intentionally grown under controlled conditions.⏎