United States.
Pfizer was founded in 1849 and has a history of 170 years. Headquartered in New York, the United States, it is the world's largest R&D-based biopharmaceutical company.
Pfizer's products cover many broad and promising therapeutic and health fields, including chemical drugs, biological agents, vaccines, health drugs, etc. At the same time, its excellent R&D and production capabilities are in a leading position in the world.
News on May 6, 2020: American pharmaceutical giant Pfizer said on Tuesday that it has begun testing an experimental vaccine in the United States to combat the new coronavirus. Pfizer said that the first batch of subjects in the United States have been vaccinated with the experimental new coronavirus vaccine BNT162.
Extended information
In terms of safety, pain, skin erythema, swelling, fever, headache, and myalgia were more common in the vaccine group than in the control group, and in the second It appears more frequently after vaccination. Most adverse reactions are mild to moderate and resolve quickly.
The New England Journal of Medicine also pointed out the limitations of the study. Since the median follow-up time of the current data in this trial is only 2 months, the long-term safety and efficacy have not yet been determined. In addition, it is unclear whether the vaccine is suitable for use in groups that are not included in clinical trials, such as children, pregnant women, and people with immune deficiencies.
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