Pfizers vaccine raises allergy concerns / Jop de Vrieze.

Polymer in mrnas packaging may cause rare anaphylactic reations.
severe allergy like reations in at least 12 people who received the covid- 19 vaccine produced by pfizer and biontech may be due to a compound in the packagin of the messenger rna mrna tha forms the vaccines main ingredient scientists say a similar mrna vaccine developed by moderna also contains the compound polyethylene glycol peg has never been used before in vacines but it is part pf many drogs El texto.