Thousands of variants have been documented as the virus mutates, including the so called British South African on Brazilian variants, which appeared to spread more swiftly than others In an effort to keep ahead off these mutations, This trial aims to assess the immune responses generators if vaccine doses from Pfizer and AstraZeneca are combined in a two shot schedule.
成千上萬的變種已被記錄為病毒突變,包括所謂的英國南非對巴西的變種,似乎比其他人更迅速地傳播在努力保持領先關閉這些突變,這項試驗的目的是評估免疫反應發生器,如果疫苗劑量從輝瑞和阿斯利康結合在兩個鏡頭時間表。