Biology, 25.08.2019 18:50, bknycfl3951

Which of the following developments in vaccines occurred most recently?
a. a vaccine using weakened viruses is developed to combat polio.
b. a vaccine against tuberculosis is developed.
c. a vaccine against hepatitis b gains approval from the government.
d. a vaccine against anthrax is developed.

Answers: 1

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Which of the following developments in vaccines occurred most recently?
a. a vaccine using w...