Sperm Cell - The male gamete, or sex cell, which carries the hereditary material of the male parent and unites with the female egg cell during sexual reproduction.⏎
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.⏎
Universal Flu Vaccine - A vaccine that is effective against all forms of the influenza virus.⏎
Strain - A genetic variant or specific subtype of a microorganism, such as a virus or bacteria.⏎