Christian Carlos. Peninsula 360 Press [P360P].
After two months of collecting samples and showing results, pharmacist Pfizer increased the effectiveness of its vaccine against SARS-CoV-2, the new coronavirus that causes COVID-19 disease, from 90 percent to 95 percent. According to data from statistics recently collected by NBC, this has left more than 250 unfortunate deaths in the United States.
On Monday, Nov. 9, it was announced that Pfizer's vaccine, in conjunction with the German firm BioNTech, was only 90 percent effective; however, both companies warned that, once the required studies were completed, there was a high probability that its final efficacy would be different.
The Food and Drug Administration (FDA) would give emergency approval for its use in the next few days; if so, it would be the first vaccine on the market to combat the COVID-19 pandemic. Pfizer's vaccine is in phase 3 of its clinical trials.
To reach 95 percent effectiveness, more than 43,000 volunteers were required, the pharmacist conducted tests where the FDA imposed a limit of up to 170 COVID-19 infections; of these, 162 corresponded to a placebo dose and only in eight people was the vaccine not effective.
It should be noted that the vaccine is up to 94 percent effective in people over 65. Regarding the side effects of the vaccine, Pfizer says: "The data show that the vaccine was well tolerated (?) no serious safety problems were observed; the only adverse event of third degree, with a frequency higher than 2%, were cases of fatigue in 3.8% and headache in 2.0%".
In the statement explains that: "The primary efficacy analysis shows that BNT162b2 - the vaccine batch - has an efficacy of 95% against COVID-19 starting 28 days after the first dose; 170 confirmed cases of COVID-19 were evaluated, with 162 volunteers in the placebo group versus 8 in the vaccine group".
It should be noted that just this Monday, it was announced that the vaccine developed by Moderna reached an effectiveness of 94.5%; however, compared to the vaccine developed by Pfizer, it showed the same effectiveness in cases where patients had already been infected with the SARS-CoV-2 virus.
However, Moderna has to go through FDA approval after two months of successful testing for emergency introduction, a process that Pfizer has completed.
Finally, Pfizer expects its formula to be replicated internationally, stating that: "they expect to produce up to 50 million doses of vaccine globally by 2020 and up to 1.3 billion doses by the end of 2021.
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