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Dr

Across
Cellular death that occurs after viral infection
Resistance to contagious disease of a large group of (mostly) vaccinated individuals
A virus that infects a bacteria
Protein coating of a virus
Lacking cells
Protein molecule on virus that "recognizes" target cell; the "key" in a lock-and-key
Down
Individual virus particle outside a host cell
Weakening of virus for vaccines
"coating" around virus
Weakened solution of virus that produces an immune response