[t-writescode]

in America, the vaccine is referred to as the "Pfizer vaccine" in the majority of newsletters. I understand this varies based on what country you're in, but this isn't unique there and is common practice for this vaccine's name.

Pfizer is easier to type than "Pfizer BioNTech" (there's 3 capital letters in that second word, 2 next to each other).

Laziness wins.