it takes
knowledge
knowledge
What is a Vaccine?
A vaccine is an injection of tiny amounts of one or more dead, weakened or purified components of viruses or bacteria. A vaccination is intended to help your immune system defend against the viruses or bacteria if you come across it in the future and to prevent any disease they may cause.1
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Should you need medicines
Pfizer markets many leading medicines across many of the world's major disease areas.
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