4 Doses vs. 3 Doses Pfizer COVID Vaccine | New BMJ Study Real World Data Does second booster help?

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Does the second booster or the 4th dose of Pfizer COVID vaccine do much good? Let’s look at the latest “real-world data”.


Disclaimer: This video is Dr. Hong’s interpretation and summary of publically available scientific information. This video is not intended to serve as any advice regarding the treatment, prevention, and diagnosis of any diseases. Dr. Hong has no connections and receives no monetary compensation from any pharmaceutical companies and government. This video is for educational purposes only.