Hsu notes that H1 and N1 protein molecules are quite large, and extracting a small segment from them to make a peptide vaccine is feasible. Although the immune effect is not as great as that of an entire protein produced in a fertilized hen's egg, it is less expensive, and there is no concern that protein from the chick embryo will cause allergies.
徐堯煇指出，流感病毒「H1」或「N1」的蛋白分子很大，擷取其中一小段來做胜 * 疫苗是可行的，雖然其免疫效果不如整個蛋白在雞胚胎中生產來得大，但成本較低，也沒有因雞胚胎蛋白質而誘發過敏的疑慮。