輝瑞承認曾「將原始新冠病毒用於表達來自新的『受關注的變種』的棘蛋白(spike protein)」(英文:we have conducted research where the original SARS-CoV-2 virus has been used to express the spike protein from new variants of concern),用來研究現存疫苗對變種嘅效用。
原始新冠病毒,表達變種嘅棘蛋白,咪即係整咗變種出來囉。有錯請指正。
更清楚嘅係,輝瑞承認,研發佢嘅新冠藥PAXLOVID時,喺有限情況中製造過變種新冠病毒。(In a limited number of cases when a full virus does not contain any known gain of function mutations, such virus may be engineered to enable the assessment of antiviral activity in cells.)