Pharmaceutical giant Pfizer’s Covid-19 vaccine has an effectiveness of no less than 90 percent. On Monday it resulted in enthusiastic experts and stock exchanges. Although it does not mean that we can put away our mouth mask in a few weeks.
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Pharmaceutical giant Pfizer was known to be very advanced in the development of a vaccine against Covid-19.
Nevertheless, the first – preliminary – results of the so-called Phase 3 study worldwide …
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