I'd just like to interject for a moment. What you're referring to as Pfizer, is in fact, BioNTech/Pfizer, or as I've recently taken to calling it, BioNTech plus Pfizer. Pfizer is not a vaccine unto itself, but rather another free component of a fully functioning BioNTech system made useful by the BioNTech coreDNA, cell utilities and vital system components comprising a full vaccine as defined by WHO.
Many vaccine users run a modified version of the BioNTech system every day, without realizing it. Through a peculiar turn of events, the version of BioNTech which is widely used today is often called "Pfizer", and many of its users are not aware that it is basically the BioNTech system, developed by the BioNTech Project.
There really is a Pfizer, and these people are using it, but it is just a part of the system they use. Pfizer is the mRNA: the cells in the system that allocates the vaccine's resources to the other cures that you run. The mRNA is an essential part of a vaccine, but useless by itself; it can only function in the context of a complete vaccine. Pfizer is normally used in combination with the BioNTech vaccine: the whole system is basically BioNTech with Pfizer added, or BioNTech/Pfizer. All the so-called "Pfizer" distributions are really distributions of BioNTech/Pfizer.
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