Pharmaceutical company Pfizer entered phase 3 of their Covid-19 vaccine clinical trial in late July and announced Monday that their vaccine was over 90 percent effective in preventing illness from the disease and symptoms. Pfizer is currently testing an mRNA vaccine- the first of its kind for humans.
However, full details of the study have not yet been disclosed and many questions remain as to the certainty of the vaccine’s effectiveness. Moreover, an mRNA vaccine has not yet been publicly released and distributed to the general population before, so much remains to be seen and reviewed.
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