两次注射 meaning in English

double injection

Eighty percent protection was afforded with one dose of vaccine and 90 percent with 2 doses .
一次注射疫苗提供80保护，两次注射则达90。
The accine doses were administered at baseline and at 1 , and 6 months
该疫苗要求在第一次注射后的第一个月和第六个月再接受两次注射。
Eighty percent protection was afforded with one dose of vaccine and 90 percent with 2 doses
一次注射疫苗提供80保护，两次注射则达90 。