In response to the pharmacy link: I suffer from alpha-gal allergy and researched mRNA vaccine ingredients prior to getting the Moderna vaccine. I was perfectly fine. There's also a /r/alphagal reddit thread discussing the vaccine they got and reactions where the majority of people said the same.
Classic flu style vaccines like J&J's covid vaccine can use either a pig or chicken egg base - the pig being potentially risky for alpha-gal allergy sufferers and egg theoretically fine. I personally have just avoided the flu vaccine though may try it this year after confirming I can get the egg based one.
The other links are interesting...alpha gal and covid-19 are both very new afflictions which don't have much history of study yet. So I take that info with a grain of salt, though lets hope it leads to some breakthrough for treatment of either COVID19 or AGS.
Re:Alpha-Gal Syndrome
by DoreenMichele on Tuesday June 22, 2021 @12:25PM
(#27593677)
Thank you.
The antibody response to the glycan α-Gal correlates with COVID-19 disease symptoms
https://onlinelibrary.wiley.com/doi/10.1002/jmv.26575
U.S. Pharmacy Chain Will Not Give COVID-19 Vaccine to Customers with Severe Allergies – But Others Will
She was surprised when pharmacy staff then declined to vaccinate her. Harman, 78, says the Ingles staff told her it was “company policy that they could not give me the vaccine because I carried an EpiPen.”
Harman was diagnosed eight years ago with alpha-gal allergy (sometimes called red meat allergy) after a tick bite.
https://www.allergicliving.com/2021/02/04/u-s-pharmacy-chain...
Immunity to glycan α-Gal and possibilities for the control of COVID-19
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7735019/
I don't fully understand what I am reading in these articles. I have no idea what alpha-gal really means.
I'm tossing it out there hoping someone more knowledgeable than me will weigh in.